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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?
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Is DMA enabled in the BIOS?
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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#
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Interchange the two drives and see what occurs!!
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Ok.. I rebooted.. and now it seems fine.. I'm still curious what was going on though...
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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
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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.
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