You are not logged in.

Pages: 1

#1 2012-03-29 23:07:12

miskoala
Member
Registered: 2012-03-27
Posts: 10

Slow hdd performance

Ok I did some research and still can't figure out why writing/reading speed is so slow in practice

hdparm -tT /dev/sda

/dev/sda:
 Timing cached reads:   1012 MB in  2.00 seconds = 506.11 MB/sec
 Timing buffered disk reads: 336 MB in  3.01 seconds = 111.58 MB/sec

With dd I get ~10 MB/s (dd if=/dev/zero of=/test bs=100M count=10)

Internally copy from mc 5-6 MB/s

I did multiple tests

What is going on here?


hdparm -I /dev/sda

/dev/sda:

ATA device, with non-removable media
	Model Number:       ST31000520AS                            
	Serial Number:      5VX0WRYD
	Firmware Revision:  CC32    
	Transport:          Serial
Standards:
	Used: unknown (minor revision code 0x0029) 
	Supported: 8 7 6 5 
	Likely used: 8
Configuration:
	Logical		max	current
	cylinders	16383	16383
	heads		16	16
	sectors/track	63	63
	--
	CHS current addressable sectors:   16514064
	LBA    user addressable sectors:  268435455
	LBA48  user addressable sectors: 1953525168
	Logical/Physical Sector size:           512 bytes
	device size with M = 1024*1024:      953869 MBytes
	device size with M = 1000*1000:     1000204 MBytes (1000 GB)
	cache/buffer size  = unknown
	Nominal Media Rotation Rate: 5900
Capabilities:
	LBA, IORDY(can be disabled)
	Queue depth: 32
	Standby timer values: spec'd by Standard, no device specific minimum
	R/W multiple sector transfer: Max = 16	Current = 16
	Advanced power management level: 192
	Recommended acoustic management value: 254, current value: 254
	DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 
	     Cycle time: min=120ns recommended=120ns
	PIO: pio0 pio1 pio2 pio3 pio4 
	     Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
	Enabled	Supported:
	   *	SMART feature set
	    	Security Mode feature set
	   *	Power Management feature set
	   *	Write cache
	   *	Look-ahead
	   *	Host Protected Area feature set
	   *	WRITE_BUFFER command
	   *	READ_BUFFER command
	   *	DOWNLOAD_MICROCODE
	   *	Advanced Power Management feature set
	    	Power-Up In Standby feature set
	    	SET_FEATURES required to spinup after power up
	    	SET_MAX security extension
	   *	Automatic Acoustic Management feature set
	   *	48-bit Address feature set
	   *	Device Configuration Overlay feature set
	   *	Mandatory FLUSH_CACHE
	   *	FLUSH_CACHE_EXT
	   *	SMART error logging
	   *	SMART self-test
	   *	General Purpose Logging feature set
	   *	WRITE_{DMA|MULTIPLE}_FUA_EXT
	   *	64-bit World wide name
	    	Write-Read-Verify feature set
	   *	WRITE_UNCORRECTABLE_EXT command
	   *	{READ,WRITE}_DMA_EXT_GPL commands
	   *	Segmented DOWNLOAD_MICROCODE
	   *	Gen1 signaling speed (1.5Gb/s)
	   *	Native Command Queueing (NCQ)
	   *	Phy event counters
	    	Device-initiated interface power management
	   *	Software settings preservation
	   *	SMART Command Transport (SCT) feature set
	   *	SCT Long Sector Access (AC1)
	   *	SCT LBA Segment Access (AC2)
	   *	SCT Error Recovery Control (AC3)
	   *	SCT Features Control (AC4)
	   *	SCT Data Tables (AC5)
	    	unknown 206[12] (vendor specific)
Security: 
	Master password revision code = 65534
		supported
	not	enabled
	not	locked
		frozen
	not	expired: security count
		supported: enhanced erase
	188min for SECURITY ERASE UNIT. 188min for ENHANCED SECURITY ERASE UNIT. 
Logical Unit WWN Device Identifier: 5000c500250e4711
	NAA		: 5
	IEEE OUI	: 000c50
	Unique ID	: 0250e4711
Checksum: correct

smartctl -a /dev/sda

smartctl 5.42 2011-10-20 r3458 [i686-linux-3.2.13-1-ARCH] (local build)
Copyright (C) 2002-11 by Bruce Allen, [url]http://smartmontools.sourceforge.net[/url]

=== START OF INFORMATION SECTION ===
Model Family:     Seagate Barracuda LP
Device Model:     ST31000520AS
Serial Number:    5VX0WRYD
LU WWN Device Id: 5 000c50 0250e4711
Firmware Version: CC32
User Capacity:    1,000,204,886,016 bytes [1,00 TB]
Sector Size:      512 bytes logical/physical
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   8
ATA Standard is:  ATA-8-ACS revision 4
Local Time is:    Fri Mar 30 00:45:54 2012 CEST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

General SMART Values:
Offline data collection status:  (0x00)	Offline data collection activity
					was never started.
					Auto Offline Data Collection: Disabled.
Self-test execution status:      (   0)	The previous self-test routine completed
					without error or no self-test has ever 
					been run.
Total time to complete Offline 
data collection: 		(  623) seconds.
Offline data collection
capabilities: 			 (0x73) SMART execute Offline immediate.
					Auto Offline data collection on/off support.
					Suspend Offline collection upon new
					command.
					No Offline surface scan supported.
					Self-test supported.
					Conveyance Self-test supported.
					Selective Self-test supported.
SMART capabilities:            (0x0003)	Saves SMART data before entering
					power-saving mode.
					Supports SMART auto save timer.
Error logging capability:        (0x01)	Error logging supported.
					General Purpose Logging supported.
Short self-test routine 
recommended polling time: 	 (   1) minutes.
Extended self-test routine
recommended polling time: 	 ( 219) minutes.
Conveyance self-test routine
recommended polling time: 	 (   2) minutes.
SCT capabilities: 	       (0x103f)	SCT Status supported.
					SCT Error Recovery Control supported.
					SCT Feature Control supported.
					SCT Data Table supported.

SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate     0x000f   119   099   006    Pre-fail  Always       -       216824470
  3 Spin_Up_Time            0x0003   096   096   000    Pre-fail  Always       -       0
  4 Start_Stop_Count        0x0032   100   100   020    Old_age   Always       -       526
  5 Reallocated_Sector_Ct   0x0033   100   100   036    Pre-fail  Always       -       3
  7 Seek_Error_Rate         0x000f   077   060   030    Pre-fail  Always       -       58496816
  9 Power_On_Hours          0x0032   084   084   000    Old_age   Always       -       14481
 10 Spin_Retry_Count        0x0013   100   100   097    Pre-fail  Always       -       0
 12 Power_Cycle_Count       0x0032   100   037   020    Old_age   Always       -       265
183 Runtime_Bad_Block       0x0032   100   100   000    Old_age   Always       -       0
184 End-to-End_Error        0x0032   100   100   099    Old_age   Always       -       0
187 Reported_Uncorrect      0x0032   100   100   000    Old_age   Always       -       0
188 Command_Timeout         0x0032   100   098   000    Old_age   Always       -       8590065682
189 High_Fly_Writes         0x003a   100   100   000    Old_age   Always       -       0
190 Airflow_Temperature_Cel 0x0022   070   054   045    Old_age   Always       -       30 (Min/Max 18/31)
194 Temperature_Celsius     0x0022   030   046   000    Old_age   Always       -       30 (0 16 0 0 0)
195 Hardware_ECC_Recovered  0x001a   039   021   000    Old_age   Always       -       216824470
197 Current_Pending_Sector  0x0012   100   100   000    Old_age   Always       -       0
198 Offline_Uncorrectable   0x0010   100   100   000    Old_age   Offline      -       0
199 UDMA_CRC_Error_Count    0x003e   200   199   000    Old_age   Always       -       9
240 Head_Flying_Hours       0x0000   100   253   000    Old_age   Offline      -       152454159153810
241 Total_LBAs_Written      0x0000   100   253   000    Old_age   Offline      -       3670022033
242 Total_LBAs_Read         0x0000   100   253   000    Old_age   Offline      -       448914133

SMART Error Log Version: 1
No Errors Logged

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  LBA_of_first_error
# 1  Short offline       Completed without error       00%     14007         -
# 2  Extended offline    Interrupted (host reset)      00%     13651         -
# 3  Extended offline    Aborted by host               90%      8256         -
# 4  Short offline       Completed without error       00%       310         -

SMART Selective self-test log data structure revision number 1
 SPAN  MIN_LBA  MAX_LBA  CURRENT_TEST_STATUS
    1        0        0  Not_testing
    2        0        0  Not_testing
    3        0        0  Not_testing
    4        0        0  Not_testing
    5        0        0  Not_testing
Selective self-test flags (0x0):
  After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.

cat /etc/fstab

# <file system>        <dir>         <type>    <options>          <dump> <pass>
devpts                   /dev/pts      devpts    defaults            0      0
shm                   /dev/shm      tmpfs     defaults            0      0

/dev/sr0             /mnt/cd   iso9660    ro,user,noauto,unhide  0      0
#/dev/dvd               /media/dvd  auto    ro,user,noauto,unhide   0      0
#/dev/fd0               /media/fl   auto    user,noauto             0      0

UUID=934647db-14d1-4641-820c-e42c0f63c0e5 /boot ext2 defaults 0 2
/dev/mapper/lvm-home /home ext4 defaults,noatime 0 2
/dev/mapper/lvm-root / ext4 defaults,noatime 0 1
/dev/mapper/lvm-swap swap swap defaults 0 0
tmpfs /tmp tmpfs noatime,nodev,nosuid,noexec,size=1536M 0 0
/dev/mapper/data /mnt/data ext4 acl,user_xattr,noatime 0 2

dmesg | grep ata

[    0.000000]  BIOS-e820: 000000001f5d7000 - 000000001f5d9000 (ACPI data)
[    0.000000]  BIOS-e820: 000000001f600000 - 000000001f608000 (ACPI data)
[    0.000000] Memory: 481496k/515072k available (3766k kernel code, 31608k reserved, 1441k data, 524k init, 0k highmem)
[    0.000000]       .data : 0xc04ad9d5 - 0xc06160c0   (1441 kB)
[   14.174799] Write protecting the kernel read-only data: 1112k
[   14.661110] libata version 3.00 loaded.
[   14.684788] ata1: SATA max UDMA/133 abar m1024@0xffe40000 port 0xffe40100 irq 45
[   14.684809] ata2: DUMMY
[   14.684826] ata3: SATA max UDMA/133 abar m1024@0xffe40000 port 0xffe40200 irq 45
[   14.684842] ata4: DUMMY
[   14.685022] ata_piix 0000:00:1f.1: version 2.13
[   14.685081] ata_piix 0000:00:1f.1: PCI INT A -> GSI 18 (level, low) -> IRQ 18
[   14.685243] ata_piix 0000:00:1f.1: setting latency timer to 64
[   14.699846] scsi4 : ata_piix
[   14.705173] scsi5 : ata_piix
[   14.715618] ata5: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xf100 irq 14
[   14.715642] ata6: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xf108 irq 15
[   15.006827] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
[   15.008016] ata1.00: ATA-8: ST31000520AS, CC32, max UDMA/133
[   15.008034] ata1.00: 1953525168 sectors, multi 16: LBA48 NCQ (depth 31/32)
[   15.009380] ata1.00: configured for UDMA/133
[   15.013441] ata3: SATA link down (SStatus 0 SControl 300)
[   40.720777] EXT4-fs (dm-1): mounted filesystem with ordered data mode. Opts: (null)
[   59.246412] EXT4-fs (dm-3): mounted filesystem with ordered data mode. Opts: (null)
[   59.339759] EXT4-fs (dm-4): mounted filesystem with ordered data mode. Opts: acl,user_xattr

EDIT: Replaced quote with code - ngoonee

EDIT: Ok, sorry smile - miskoala

Last edited by miskoala (2012-03-30 08:18:09)

Offline

#2 2012-03-30 03:09:27

ngoonee
Forum Fellow
From: Between Thailand and Singapore
Registered: 2009-03-17
Posts: 7,362

Re: Slow hdd performance

Please use code tags, not quote tags, when posting code. This is overly long... did it for you this time, don't repeat please.

Allan-Volunteer on the (topic being discussed) mailn lists. You never get the people who matters attention on the forums.
jasonwryan-Installing Arch is a measure of your literacy. Maintaining Arch is a measure of your diligence. Contributing to Arch is a measure of your competence.
Griemak-Bleeding edge, not bleeding flat. Edge denotes falls will occur from time to time. Bring your own parachute.

Offline

#3 2012-03-30 12:03:13

miskoala
Member
Registered: 2012-03-27
Posts: 10

Re: Slow hdd performance

I booted this drive from another computer (Asrock M3A770DE mobo) and works fine, speed with dd was ~100MB/s


I also update bios on my first computer with Intel D945GSEJT (there is selected AHCI mode) still the same transfers with dd (~10Mb/s)

I have no idea what to do with it now hmm


EDIT:

More tests with other hdd (Samsung HD502IJ), dd on mounted NTFS partition:

Intel D945GSEJT booted from Archlinux iso:
hdparm: ~75 MB/s
dd: ~10 MB/s

Intel D945GSEJT booted from Archlinux iso, HDD connected to PCI SATA controller (Promise 378):
hdparm: ~60 MB/s
dd: ~10 MB/s


Asrock M3A770DE booted from Archlinux iso:
hdparm: ~87 MB/s
dd: ~76 MB/s

Asrock M3A770DE booted from Archlinux iso, HDD connected to PCI SATA controller (Promise 378):
hdparm: ~81MB/s
dd: ~76 MB/s


What is broken on D945GSEJT?

Last edited by miskoala (2012-03-30 13:47:23)

Offline

#4 2012-03-30 13:52:16

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

Re: Slow hdd performance

Have you tried another hard disk in the slow computer/a live CD? Try to narrow down the problem, find out whether it is the system or the BIOS...

never trust a toad...
::Grateful ArchDonor::
::Grateful Wikipedia Donor::

Offline

#5 2012-03-30 14:24:38

miskoala
Member
Registered: 2012-03-27
Posts: 10

Re: Slow hdd performance

I tried two hard disk in slow computer: Samsung HD502IJ and Seagate LP, checked with both IDE an AHCI mode for sata in BIOS, and I tried "load defualt" setting too tongue
Everytime I get ~10MB/s with dd and 75-110Mb/s with hdparm (also checked with kernel 3.0.3 and 3.2.13)

Offline

#6 2012-03-30 15:04:35

Lone_Wolf
Administrator
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 15,392

Re: Slow hdd performance

The intel motherboard is a mini-ITX motherboard designed for an atom processor, while the asrock motherboard targets gaming users and an AMD AM3 proc .

in short, the intel mobo / proc is not powerful enough to use the drives at full speed.

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky

Offline

#7 2012-03-30 15:40:02

miskoala
Member
Registered: 2012-03-27
Posts: 10

Re: Slow hdd performance

This Atom must be really poor

on Pentium 4 1,9Ghz with ATA hdd i've got:

hdparm: 40 MB/s
dd: 19 MB/s

I thought Atom should be a little better than low P4

Offline

#8 2012-03-31 08:43:46

Lone_Wolf
Administrator
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 15,392

Re: Slow hdd performance

The huge popularity of the intel atom is always been a bit of a mistery to me.
if you look at power procs like the Via C series performed the same and used less power.
Performance wise both Intel's and AMD's low power variations of their normal cpu lines performed way better, and the difference in power comsumption was not big.

as for the low P4 : the original Pentium 4 with DDR between 1.8 Mhz and 2.8 Mhz were decent processors. If that low P4 has rambus memory, it was  a top model in it's day.
Atom has never been a top model.

Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.

clean chroot building not flexible enough ?
Try clean chroot manager by graysky

Offline

#9 2012-03-31 09:14:46

Pierre
Developer
From: Bonn
Registered: 2004-07-05
Posts: 1,967
Website

Re: Slow hdd performance

Wait a sec. The Atom is not a fast CPU but it is not that slow. It may also outperform a P4. Here are the results from my netbook:

 Timing cached reads:   1644 MB in  2.00 seconds = 821.99 MB/sec
 Timing buffered disk reads: 720 MB in  3.01 seconds = 239.35 MB/sec

and

1048576000 Bytes (1,0 GB) kopiert, 6,58513 s, 159 MB/s
sudo dd if=/dev/zero of=/test bs=100M count=10  0,01s user 5,04s system 76% cpu 6,611 total

uname:

Linux cameron 3.3.0-1-ARCH #1 SMP PREEMPT Mon Mar 19 10:03:33 CET 2012 x86_64 Intel(R) Atom(TM) CPU N455 @ 1.66GHz GenuineIntel GNU/Linux

HD is a Samsung 830, 128GB.

PS: I tested each one three times; the results are stable.

3E80 CA1A 8B89 F69C BA57  D98A 76A5 EF90 5444 9A5C

Offline

#10 2012-03-31 10:05:47

miskoala
Member
Registered: 2012-03-27
Posts: 10

Re: Slow hdd performance

I have netbook with Atom too, with slow ATA drive, but:

dd if=/dev/zero of=/test bs=100M count=10
skopiowane 1048576000 bajtów (1,0 GB), 51,5271 s, 20,3 MB/s
 Timing cached reads:   784 MB in  2.00 seconds = 392.08 MB/sec
 Timing buffered disk reads: 110 MB in  3.05 seconds =  36.12 MB/sec

uname -a

Linux dell1210 3.2.13-1-ARCH #1 SMP PREEMPT Sat Mar 24 08:09:57 UTC 2012 i686 Intel(R) Atom(TM) CPU Z520 @ 1.33GHz GenuineIntel GNU/Linux

still better in practice than Intel D945GSEJT (Atom N270 1.60GHz)

Offline

Pages: 1

Board footer

Powered by FluxBB