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#1 2009-12-09 15:15:22

CaptainKirk
Member
Registered: 2009-06-07
Posts: 391

What are Normal Disk Speeds

I think that my hard drive is very slow. That's how it seems. This is what hdparm shows:

[kirk@localhost ~]$ sudo hdparm -Tt /dev/sdb3

/dev/sdb3:
Timing cached reads:   1660 MB in  2.00 seconds = 829.94 MB/sec
Timing buffered disk reads:  236 MB in  3.03 seconds =  77.94 MB/sec
[kirk@localhost ~]$ sudo hdparm -Tt /dev/sdb3

/dev/sdb3:
Timing cached reads:   1662 MB in  2.00 seconds = 831.09 MB/sec
Timing buffered disk reads:  226 MB in  3.02 seconds =  74.80 MB/sec
[kirk@localhost ~]$ sudo hdparm -Tt /dev/sdb3

/dev/sdb3:
Timing cached reads:   1718 MB in  2.00 seconds = 858.59 MB/sec
Timing buffered disk reads:  234 MB in  3.00 seconds =  77.90 MB/sec
[kirk@localhost ~]$ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sdb3              23G  9.3G   13G  43% /
none                 1013M  196K 1013M   1% /dev
none                 1013M     0 1013M   0% /dev/shm
/dev/sdb1             183M   12M  162M   7% /boot
/dev/sdb5              92G   23G   65G  26% /srv
/dev/sdb6             175G   93G   74G  56% /home
/dev/sdg1             1.9G  213M  1.7G  12% /media/disk
[kirk@localhost ~]$ sudo hdparm -Tt /dev/sdb6

/dev/sdb6:
Timing cached reads:   1614 MB in  2.00 seconds = 806.60 MB/sec
Timing buffered disk reads:  218 MB in  3.02 seconds =  72.22 MB/sec
[kirk@localhost ~]$ sudo hdparm -Tt /dev/sdb5

/dev/sdb5:
Timing cached reads:   1544 MB in  2.00 seconds = 772.22 MB/sec
Timing buffered disk reads:  236 MB in  3.02 seconds =  78.20 MB/sec

Are these times slow?

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#2 2009-12-09 15:29:58

toad
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From: if only I knew
Registered: 2008-12-22
Posts: 1,775
Website

Re: What are Normal Disk Speeds

toad@deskarch 168\21 ~ > sudo hdparm -Tt /dev/sda

/dev/sda:
Timing cached reads:   14230 MB in  2.00 seconds = 7125.81 MB/sec
Timing buffered disk reads:  178 MB in  3.01 seconds =  59.09 MB/sec

never trust a toad...
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#3 2009-12-09 16:22:30

bernarcher
Forum Fellow
From: Germany
Registered: 2009-02-17
Posts: 2,281

Re: What are Normal Disk Speeds

@toad
A really fast disk you have. big_smile

Mine are pretty standard old fashioned IDE drives:

$ sudo hdparm -Tt /dev/sda

/dev/sda:
 Timing cached reads:   1696 MB in  2.00 seconds = 848.39 MB/sec
 Timing buffered disk reads:  132 MB in  3.02 seconds =  43.73 MB/sec
$ sudo hdparm -Tt /dev/sdb
Passwort: 

/dev/sdb:
 Timing cached reads:   1700 MB in  2.00 seconds = 850.09 MB/sec
 Timing buffered disk reads:  230 MB in  3.02 seconds =  76.28 MB/sec

To know or not to know ...
... the questions remain forever.

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#4 2009-12-09 16:52:43

JohannesSM64
Member
From: Norway
Registered: 2009-10-11
Posts: 623
Website

Re: What are Normal Disk Speeds

/dev/sda:
Timing cached reads:   7040 MB in  2.00 seconds = 3521.94 MB/sec
Timing buffered disk reads:  304 MB in  3.01 seconds = 100.89 MB/sec

WD Caviar.

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#5 2009-12-09 16:55:34

rusty99
Member
Registered: 2009-03-18
Posts: 253

Re: What are Normal Disk Speeds

3yr old Seagate

/dev/sda:
 Timing cached reads:   2730 MB in  2.00 seconds = 1366.09 MB/sec
 Timing buffered disk reads:  212 MB in  3.01 seconds =  70.37 MB/sec

2mth old WD Black

/dev/sdb:
 Timing cached reads:   2798 MB in  2.00 seconds = 1399.97 MB/sec
 Timing buffered disk reads:  324 MB in  3.01 seconds = 107.67 MB/sec

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#6 2009-12-09 17:00:43

toad
Member
From: if only I knew
Registered: 2008-12-22
Posts: 1,775
Website

Re: What are Normal Disk Speeds

@ bernacher
Don't know, my buffered disk reads are among the slowest around (whatever that means!).

But to get back on topic, the OP's disks appear bog standard IDE and perfectly alright. Perhaps there is another reason for the slow box? What does /var/log/everything.log say? Anything interesting?

never trust a toad...
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#7 2009-12-09 18:25:24

llcawthorne
Member
From: Columbia, SC
Registered: 2009-10-16
Posts: 142

Re: What are Normal Disk Speeds

The cached read look a bit slow.  Are they old drives?  I think there is a tendency to be slower if you test on a particular partition rather than the drive device...  Here's some other tests you can do against your hard drive if you want different data to compare than hdparm -Tt.  Have you tried pulling any numbers from bonnie/bonnie++?  Been forever since I messed with this stuff.  I would normally ask if DMA was on, but sda's are treated different from hda's - DMA only reports on my old IDE's. 

An old 120GB SATA Drive:

/dev/sdd:
 Timing cached reads:   17174 MB in  2.00 seconds = 8595.66 MB/sec
 Timing buffered disk reads:  176 MB in  3.01 seconds =  58.39 MB/sec

Two 1TB WD Blacks:

/dev/sda:
 Timing cached reads:   20430 MB in  2.00 seconds = 10228.47 MB/sec
 Timing buffered disk reads:  306 MB in  3.00 seconds = 101.89 MB/sec

/dev/sdc:
 Timing cached reads:   20482 MB in  2.00 seconds = 10252.47 MB/sec
 Timing buffered disk reads:  308 MB in  3.00 seconds = 102.54 MB/sec
root ~ # hdparm -Tt /dev/sda

A couple of IDE hard drives (500GB and 320GB) [some flavor of Western Digital, not green]:

/dev/hda:
 Timing cached reads:   20238 MB in  2.00 seconds = 10132.97 MB/sec
 Timing buffered disk reads:  204 MB in  3.01 seconds =  67.79 MB/sec
root ~ # hdparm -Tt /dev/hdb

/dev/hdb:
 Timing cached reads:   19426 MB in  2.00 seconds = 9726.51 MB/sec
 Timing buffered disk reads:  190 MB in  3.01 seconds =  63.12 MB/sec

Interesting that cached reads can vary from poster to poster by factors of 10 or more, but buffered reads look like they are differ by about 2-2.5x max from poster to poster.

To understand recursion, you must understand recursion.

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#8 2009-12-09 19:06:34

tomd123
Developer
Registered: 2008-08-12
Posts: 565

Re: What are Normal Disk Speeds

/dev/sda:
Timing cached reads:   1856 MB in  2.00 seconds = 928.46 MB/sec
Timing buffered disk reads:   94 MB in  3.02 seconds =  31.11 MB/sec

This is on a laptop.

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#9 2009-12-09 19:09:18

CaptainKirk
Member
Registered: 2009-06-07
Posts: 391

Re: What are Normal Disk Speeds

Part of /var/log/everything.log below. Anything I should be looking for?

Dec  9 18:21:03 localhost -- MARK --
Dec  9 18:41:03 localhost -- MARK --
Dec  9 19:01:01 localhost dhcpcd: sending signal 14 to pid 1131
Dec  9 19:01:01 localhost dhcpcd: received SIGALRM, rebinding lease
Dec  9 19:01:01 localhost dhcpcd: eth0: reading lease `/var/lib/dhcpcd/dhcpcd-eth0.lease'
Dec  9 19:01:01 localhost dhcpcd: eth0: rebinding lease of 10.0.0.1
Dec  9 19:01:01 localhost dhcpcd: eth0: sending DHCP_REQUEST (xid 0x78e50cc0), next in 4.13 seconds
Dec  9 19:01:01 localhost dhcpcd: eth0: acknowledged 10.0.0.1 from 10.0.0.138
Dec  9 19:01:01 localhost dhcpcd: eth0: leased 10.0.0.1 for 86400 seconds
Dec  9 19:01:01 localhost dhcpcd: eth0: adding IP address 10.0.0.1/24
Dec  9 19:01:01 localhost dhcpcd: eth0: writing lease `/var/lib/dhcpcd/dhcpcd-eth0.lease'
Dec  9 19:01:01 localhost dhcpcd: eth0: executing `/usr/lib/dhcpcd/dhcpcd-run-hooks', reason REBIND
Dec  9 19:01:01 localhost dhcpcd: eth0: sending ARP announce (1 of 2), next in 2.00 seconds
Dec  9 19:01:03 localhost dhcpcd: eth0: sending ARP announce (2 of 2)
Dec  9 19:21:03 localhost -- MARK --
Dec  9 19:41:03 localhost -- MARK --
Dec  9 20:01:01 localhost dhcpcd: sending signal 14 to pid 1131
Dec  9 20:01:01 localhost dhcpcd: received SIGALRM, rebinding lease
Dec  9 20:01:01 localhost dhcpcd: eth0: reading lease `/var/lib/dhcpcd/dhcpcd-eth0.lease'
Dec  9 20:01:01 localhost dhcpcd: eth0: rebinding lease of 10.0.0.1
Dec  9 20:01:01 localhost dhcpcd: eth0: sending DHCP_REQUEST (xid 0x7ce45844), next in 3.65 seconds
Dec  9 20:01:01 localhost dhcpcd: eth0: acknowledged 10.0.0.1 from 10.0.0.138
Dec  9 20:01:01 localhost dhcpcd: eth0: leased 10.0.0.1 for 86400 seconds
Dec  9 20:01:01 localhost dhcpcd: eth0: adding IP address 10.0.0.1/24
Dec  9 20:01:01 localhost dhcpcd: eth0: writing lease `/var/lib/dhcpcd/dhcpcd-eth0.lease'
Dec  9 20:01:01 localhost dhcpcd: eth0: executing `/usr/lib/dhcpcd/dhcpcd-run-hooks', reason REBIND
Dec  9 20:01:01 localhost dhcpcd: eth0: sending ARP announce (1 of 2), next in 2.00 seconds
Dec  9 20:01:03 localhost dhcpcd: eth0: sending ARP announce (2 of 2)
Dec  9 20:21:03 localhost -- MARK --
Dec  9 20:41:03 localhost -- MARK --
Dec  9 21:01:01 localhost dhcpcd: sending signal 14 to pid 1131
Dec  9 21:01:01 localhost dhcpcd: received SIGALRM, rebinding lease
Dec  9 21:01:01 localhost dhcpcd: eth0: reading lease `/var/lib/dhcpcd/dhcpcd-eth0.lease'
Dec  9 21:01:01 localhost dhcpcd: eth0: rebinding lease of 10.0.0.1
Dec  9 21:01:01 localhost dhcpcd: eth0: sending DHCP_REQUEST (xid 0x34a24c57), next in 4.40 seconds
Dec  9 21:01:01 localhost dhcpcd: eth0: acknowledged 10.0.0.1 from 10.0.0.138
Dec  9 21:01:01 localhost dhcpcd: eth0: leased 10.0.0.1 for 86400 seconds
Dec  9 21:01:01 localhost dhcpcd: eth0: adding IP address 10.0.0.1/24
Dec  9 21:01:01 localhost dhcpcd: eth0: writing lease `/var/lib/dhcpcd/dhcpcd-eth0.lease'
Dec  9 21:01:01 localhost dhcpcd: eth0: executing `/usr/lib/dhcpcd/dhcpcd-run-hooks', reason REBIND
Dec  9 21:01:01 localhost dhcpcd: eth0: sending ARP announce (1 of 2), next in 2.00 seconds
Dec  9 21:01:03 localhost dhcpcd: eth0: sending ARP announce (2 of 2)

> To understand recursion, you must understand recursion.

Sorry, could repeat that?

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#10 2009-12-09 19:14:59

toad
Member
From: if only I knew
Registered: 2008-12-22
Posts: 1,775
Website

Re: What are Normal Disk Speeds

Nope, everything looking dandy smile

never trust a toad...
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#11 2009-12-09 19:22:13

CaptainKirk
Member
Registered: 2009-06-07
Posts: 391

Re: What are Normal Disk Speeds

Wait, there's more smile

But nothing LOOKS funny to me either here. But I tell you, opening a file in OpenOffice or sometimes just typing a URL into Firefox takes 10 times what I think it should. It was faster before, too. Not sure what/when it changed.

Dec  9 16:45:25 localhost kernel: usb 1-3.1: USB disconnect, address 19
Dec  9 16:45:26 localhost kernel: usb 1-3: new high speed USB device using ehci_hcd and address 20
Dec  9 16:45:26 localhost kernel: usb 1-3: configuration #1 chosen from 1 choice
Dec  9 16:45:26 localhost kernel: hub 1-3:1.0: USB hub found
Dec  9 16:45:26 localhost kernel: hub 1-3:1.0: 4 ports detected
Dec  9 16:45:26 localhost kernel: usb 1-3.1: new high speed USB device using ehci_hcd and address 21
Dec  9 16:45:26 localhost kernel: usb 1-3.1: configuration #1 chosen from 1 choice
Dec  9 16:45:26 localhost kernel: scsi14 : SCSI emulation for USB Mass Storage devices
Dec  9 16:45:26 localhost kernel: usb-storage: device found at 21
Dec  9 16:45:26 localhost kernel: usb-storage: waiting for device to settle before scanning
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot disable port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot disable port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot disable port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot reset port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: Cannot enable port 1.  Maybe the USB cable is bad?
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot disable port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: cannot disable port 1 (err = -71)
Dec  9 16:45:31 localhost kernel: usb-storage: device scan complete
Dec  9 16:45:31 localhost kernel: hub 1-3:1.0: hub_port_status failed (err = -71)
Dec  9 16:48:24 localhost kernel: usb 4-1: new full speed USB device using uhci_hcd and address 2
Dec  9 16:48:24 localhost kernel: usb 4-1: configuration #1 chosen from 1 choice
Dec  9 16:49:34 localhost kernel: usb 1-3.1: USB disconnect, address 21
Dec  9 16:49:34 localhost kernel: usb 1-3: reset high speed USB device using ehci_hcd and address 20
Dec  9 16:49:35 localhost kernel: usb 1-3.1: new high speed USB device using ehci_hcd and address 23
Dec  9 16:49:35 localhost kernel: usb 1-3.1: configuration #1 chosen from 1 choice
Dec  9 16:49:35 localhost kernel: scsi15 : SCSI emulation for USB Mass Storage devices
Dec  9 16:49:35 localhost kernel: usb-storage: device found at 23
Dec  9 16:49:35 localhost kernel: usb-storage: waiting for device to settle before scanning
Dec  9 16:49:40 localhost kernel: scsi 15:0:0:0: Direct-Access     Generic  USB SD Reader    1.00 PQ: 0 ANSI: 0
Dec  9 16:49:40 localhost kernel: sd 15:0:0:0: Attached scsi generic sg2 type 0
Dec  9 16:49:40 localhost kernel: scsi 15:0:0:1: Direct-Access     Generic  USB CF Reader    1.01 PQ: 0 ANSI: 0
Dec  9 16:49:40 localhost kernel: sd 15:0:0:1: Attached scsi generic sg3 type 0
Dec  9 16:49:40 localhost kernel: sd 15:0:0:0: [sdc] Attached SCSI removable disk
Dec  9 16:49:40 localhost kernel: scsi 15:0:0:2: Direct-Access     Generic  USB SM Reader    1.02 PQ: 0 ANSI: 0
Dec  9 16:49:40 localhost kernel: sd 15:0:0:2: Attached scsi generic sg4 type 0
Dec  9 16:49:40 localhost kernel: scsi 15:0:0:3: Direct-Access     Generic  USB MS Reader    1.03 PQ: 0 ANSI: 0
Dec  9 16:49:40 localhost kernel: sd 15:0:0:3: Attached scsi generic sg5 type 0
Dec  9 16:49:40 localhost kernel: usb-storage: device scan complete
Dec  9 16:49:40 localhost kernel: sd 15:0:0:1: [sdd] Attached SCSI removable disk
Dec  9 16:49:40 localhost kernel: sd 15:0:0:3: [sdf] Attached SCSI removable disk
Dec  9 16:49:40 localhost kernel: sd 15:0:0:2: [sde] Attached SCSI removable disk
Dec  9 17:01:01 localhost dhcpcd: received SIGALRM, rebinding lease
Dec  9 17:01:01 localhost dhcpcd: eth0: reading lease `/var/lib/dhcpcd/dhcpcd-eth0.lease'
Dec  9 17:01:01 localhost dhcpcd: eth0: rebinding lease of 10.0.0.1
Dec  9 17:01:01 localhost dhcpcd: sending signal 14 to pid 1131
Dec  9 17:01:01 localhost dhcpcd: eth0: sending DHCP_REQUEST (xid 0x7b6fcecc), next in 3.53 seconds
Dec  9 17:01:01 localhost dhcpcd: eth0: acknowledged 10.0.0.1 from 10.0.0.138
Dec  9 17:01:01 localhost dhcpcd: eth0: leased 10.0.0.1 for 86400 seconds
Dec  9 17:01:01 localhost dhcpcd: eth0: adding IP address 10.0.0.1/24
Dec  9 17:01:01 localhost dhcpcd: eth0: writing lease `/var/lib/dhcpcd/dhcpcd-eth0.lease'
Dec  9 17:01:01 localhost dhcpcd: eth0: executing `/usr/lib/dhcpcd/dhcpcd-run-hooks', reason REBIND

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#12 2009-12-09 19:50:29

toad
Member
From: if only I knew
Registered: 2008-12-22
Posts: 1,775
Website

Re: What are Normal Disk Speeds

I bet there's more wink Reason I asked in the first place was 'cos I had an issue with faulty memory addressing which slowed me down no end - and I noticed another thread bemoaning something similar a couple of days ago. This does not seem to be the case with you though.

Your kernel is moaning about your usb hub though - anything important on that?

never trust a toad...
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#13 2009-12-09 22:43:41

R00KIE
Forum Fellow
From: Between a computer and a chair
Registered: 2008-09-14
Posts: 4,734

Re: What are Normal Disk Speeds

Cached reads have more to do with ram and cpu speed than anything else, come on guys, look at the numbers, do you really think any disk interface in a normal desktop pc can handle those transfer speeds? tongue

Here goes an example:
With powersave cpu governor (which means always the lowest speed)

$ sudo hdparm -tT /dev/sda

/dev/sda:
 Timing cached reads:   940 MB in  2.00 seconds = 469.48 MB/sec
 Timing buffered disk reads:  176 MB in  3.03 seconds =  58.14 MB/sec

With the performace cpu governor (which means always the highest speed)

$ sudo hdparm -tT /dev/sda

/dev/sda:
 Timing cached reads:   2182 MB in  2.00 seconds = 1091.26 MB/sec
 Timing buffered disk reads:  178 MB in  3.02 seconds =  58.88 MB/sec

R00KIE
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#14 2009-12-10 10:48:26

CaptainKirk
Member
Registered: 2009-06-07
Posts: 391

Re: What are Normal Disk Speeds

> Your kernel is moaning about your usb hub though - anything important on that?

No, I think that's just because I was playing with thumb drives and MP3 machines today. I don't use those for anything serious.

Anyway I think I may buy a new PC soon. This one's not precisely new. smile

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#15 2009-12-30 17:34:47

siot
Member
Registered: 2009-11-10
Posts: 27

Re: What are Normal Disk Speeds

$ hdparm -Tt /dev/mapper/magatzem-lvhome 

/dev/mapper/magatzem-lvhome:
 Timing cached reads:   2636 MB in  2.00 seconds = 1319.19 MB/sec
 Timing buffered disk reads:  678 MB in  3.01 seconds = 225.49 MB/sec

Recycling 4 old hdd + lvm stripped.

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#16 2009-12-30 18:30:08

lilsirecho
Veteran
Registered: 2003-10-24
Posts: 5,000

Re: What are Normal Disk Speeds

My 2 cents with a raid array:

root@n6re ~]# hdparm -tT /dev/md1

/dev/md1:
Timing cached reads:   2374 MB in  2.00 seconds = 1186.83 MB/sec
Timing buffered disk reads:  540 MB in  3.01 seconds = 179.63 MB/sec
[root@n6re ~]#

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#17 2009-12-30 19:04:24

graysky
Wiki Maintainer
From: :wq
Registered: 2008-12-01
Posts: 10,600
Website

Re: What are Normal Disk Speeds

@op - IDE or SATA?  5400 or 7200 RPM?  Make/model?

Here is a SATA2 7200 RPM Seagate 1 gig drive on a P35 motherboard running an X3360 @ 3.4 GHz.

# hdparm -Tt /dev/sda

/dev/sda: 

 Timing cached reads:   17218 MB in  2.00 seconds = 8621.26 MB/sec
 Timing buffered disk reads:  370 MB in  3.01 seconds = 123.03 MB/sec

The -T switch has nothing to do with the physical HDD by the way so only run it with the -t switch for comparison purposes.

hdparm manpage wrote:

-T

Perform  timings  of  cache reads for benchmark and comparison purposes.  This displays the speed of reading directly from the Linux buffer  cache  without  disk  access. This measurement is essentially an indication of the throughput of the processor, cache, and memory of the system under test.

Last edited by graysky (2009-12-30 19:07:32)

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#18 2009-12-30 19:12:38

flamelab
Member
From: Athens, Hellas (Greece)
Registered: 2007-12-26
Posts: 2,160

Re: What are Normal Disk Speeds

hdparm -Tt /dev/sda

/dev/sda:
 Timing cached reads:   9114 MB in  2.00 seconds = 4562.73 MB/sec
 Timing buffered disk reads:  328 MB in  3.01 seconds = 109.00 MB/sec

my WD6401AALS.

Last edited by flamelab (2009-12-30 19:12:50)

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#19 2010-01-01 01:53:05

iBertus
Member
From: Greenville, NC
Registered: 2004-11-04
Posts: 2,228

Re: What are Normal Disk Speeds

Single drive:

/dev/sda:
 Timing cached reads:   13058 MB in  2.00 seconds = 6539.16 MB/sec
 Timing buffered disk reads:  344 MB in  3.00 seconds = 114.52 MB/sec

Viva raid10,f2:

/dev/md0:
 Timing cached reads:   12636 MB in  2.00 seconds = 6326.63 MB/sec
 Timing buffered disk reads:  1294 MB in  3.00 seconds = 431.07 MB/sec

Still need some tweaks on my raid setup.

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#20 2010-01-01 02:39:38

dmz
Member
From: Sweden
Registered: 2008-08-27
Posts: 881
Website

Re: What are Normal Disk Speeds

Mine are slow... though I've no problem actually using them. Could this really be right? WD Elements (green):

» hdparm -tT /dev/sd{a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,u}

/dev/sda:
 Timing cached reads:   2544 MB in  2.00 seconds = 1272.76 MB/sec
 Timing buffered disk reads:  258 MB in  3.02 seconds =  85.38 MB/sec

/dev/sdb:
 Timing cached reads:   2440 MB in  2.00 seconds = 1220.60 MB/sec
 Timing buffered disk reads:  230 MB in  3.02 seconds =  76.23 MB/sec

/dev/sdc:
 Timing cached reads:   2268 MB in  2.00 seconds = 1134.15 MB/sec
 Timing buffered disk reads:  234 MB in  3.02 seconds =  77.53 MB/sec

/dev/sdd:
 Timing cached reads:   2212 MB in  2.00 seconds = 1106.85 MB/sec
 Timing buffered disk reads:   52 MB in  3.11 seconds =  16.74 MB/sec

/dev/sde:
 Timing cached reads:   2338 MB in  2.00 seconds = 1169.89 MB/sec
 Timing buffered disk reads:   84 MB in  3.01 seconds =  27.88 MB/sec

/dev/sdf:
 Timing cached reads:   2244 MB in  2.00 seconds = 1122.74 MB/sec
 Timing buffered disk reads:   84 MB in  3.05 seconds =  27.55 MB/sec

/dev/sdg:
 Timing cached reads:   2238 MB in  2.00 seconds = 1120.11 MB/sec
 Timing buffered disk reads:   82 MB in  3.04 seconds =  26.93 MB/sec

/dev/sdh:
 Timing cached reads:   1794 MB in  2.00 seconds = 897.11 MB/sec
 Timing buffered disk reads:   84 MB in  3.04 seconds =  27.67 MB/sec

/dev/sdi:
 Timing cached reads:   2280 MB in  2.00 seconds = 1140.38 MB/sec
 Timing buffered disk reads:   80 MB in  3.07 seconds =  26.07 MB/sec

/dev/sdj:
 Timing cached reads:   2376 MB in  2.00 seconds = 1188.45 MB/sec
 Timing buffered disk reads:   76 MB in  3.11 seconds =  24.46 MB/sec

/dev/sdk:
 Timing cached reads:   1900 MB in  2.00 seconds = 950.46 MB/sec
 Timing buffered disk reads:   82 MB in  3.03 seconds =  27.08 MB/sec

/dev/sdl:
 Timing cached reads:   1902 MB in  2.00 seconds = 951.21 MB/sec
 Timing buffered disk reads:   78 MB in  3.01 seconds =  25.88 MB/sec

/dev/sdm:
 Timing cached reads:   2392 MB in  2.00 seconds = 1196.49 MB/sec
 Timing buffered disk reads:   72 MB in  3.03 seconds =  23.77 MB/sec

/dev/sdn:
 Timing cached reads:   2382 MB in  2.00 seconds = 1191.83 MB/sec
 Timing buffered disk reads:   70 MB in  3.01 seconds =  23.25 MB/sec

/dev/sdo:
 Timing cached reads:   2344 MB in  2.00 seconds = 1172.95 MB/sec
 Timing buffered disk reads:   82 MB in  3.04 seconds =  26.98 MB/sec

/dev/sdp:
 Timing cached reads:   2108 MB in  2.00 seconds = 1054.82 MB/sec
 Timing buffered disk reads:   82 MB in  3.04 seconds =  26.98 MB/sec

/dev/sdq:
 Timing cached reads:   2384 MB in  2.00 seconds = 1192.39 MB/sec
 Timing buffered disk reads:   74 MB in  3.00 seconds =  24.64 MB/sec

/dev/sdr:
 Timing cached reads:   2392 MB in  2.00 seconds = 1196.67 MB/sec
 Timing buffered disk reads:   74 MB in  3.01 seconds =  24.58 MB/sec

/dev/sds:
 Timing cached reads:   2302 MB in  2.00 seconds = 1151.73 MB/sec
 Timing buffered disk reads:   82 MB in  3.06 seconds =  26.81 MB/sec

/dev/sdu:
 Timing cached reads:   1996 MB in  2.00 seconds = 998.62 MB/sec
 Timing buffered disk reads:   22 MB in  3.18 seconds =   6.92 MB/sec

ls++ | LS_COLORS project | file management in vim | tons of utilities | configs | japh.se

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