Extremely slow performance with NEW hdd

dmz · 2008-10-29 23:58:59

Ok guys, this is pretty frustrating. Today I bought 2 new external hdd's, same manufacturer, same model. One of them seems to work great, but the other one.. well look at this:

/dev/sdk1:
 Timing buffered disk reads:   96 MB in  3.04 seconds =  31.53 MB/sec
bash-3.2# hdparm -t /dev/sdj1

/dev/sdj1:
 Timing buffered disk reads:    4 MB in  4.30 seconds = 951.52 kB/sec

As you can see, my sdj is extremely slow - what could possibly be wrong here?

fukawi2 · 2008-10-30 00:03:00

Is DMA enabled in the BIOS?

dmz · 2008-10-30 00:13:47

fukawi2 wrote:

Is DMA enabled in the BIOS?

Probably - If it wasn't the other drive shouldnt behave like normal.

By the way:

bash-3.2# dmesg | grep -i ata.*dma
ata1: SATA max UDMA/133 abar m1024@0xfe02f000 port 0xfe02f100 irq 22
ata2: SATA max UDMA/133 abar m1024@0xfe02f000 port 0xfe02f180 irq 22
ata3: SATA max UDMA/133 abar m1024@0xfe02f000 port 0xfe02f200 irq 22
ata4: SATA max UDMA/133 abar m1024@0xfe02f000 port 0xfe02f280 irq 22
ata1.00: ATA-8: SAMSUNG HD501LJ, CR100-11, max UDMA7
ata1.00: configured for UDMA/133
ata2.00: ATA-7: ST3320820AS, 3.AAD, max UDMA/133
ata2.00: configured for UDMA/133
ata3.00: ATA-8: SAMSUNG HD501LJ, CR100-12, max UDMA7
ata3.00: configured for UDMA/133
bash-3.2#

lilsirecho · 2008-10-30 02:32:31

Interchange the two drives and see what occurs!!

dmz · 2008-10-30 03:02:49

Ok.. I rebooted.. and now it seems fine.. I'm still curious what was going on though...

Evanlec · 2008-10-30 03:10:39

i might venture to ask how the drives are connected.. u said they were external so... USB? make sure you're using a usb 2.0 port

dmz · 2008-10-30 03:12:02

Evanlec wrote:

i might venture to ask how the drives are connected.. u said they were external so... USB? make sure you're using a usb 2.0 port

Yep, USB 2.0.

Arch Linux

#1 2008-10-29 23:58:59

Extremely slow performance with NEW hdd

#2 2008-10-30 00:03:00

Re: Extremely slow performance with NEW hdd

#3 2008-10-30 00:13:47

Re: Extremely slow performance with NEW hdd

#4 2008-10-30 02:32:31

Re: Extremely slow performance with NEW hdd

#5 2008-10-30 03:02:49

Re: Extremely slow performance with NEW hdd

#6 2008-10-30 03:10:39

Re: Extremely slow performance with NEW hdd

#7 2008-10-30 03:12:02

Re: Extremely slow performance with NEW hdd

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