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dmn
n00b
Joined: 19 May 2005
Posts: 12
Location: Russia, Siberia, Kemerovo
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 Posted: Thu Aug 18, 2005 3:25 am Post subject: SCSI RAID VS hdparm = trouble |
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Hi 2 ALL!
I have problem with my SCSI RAID adapter.
I have RAID 1 (2 HDD SCSI). But the speed is very slow for SCSI... 
| Code: | # hdparm -t /dev/sda
/dev/sda:
Timing buffered disk reads: 132 MB in 3.01 seconds = 43.89 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate ioctl for device |
How can I solwe this problem?
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54830
Location: 56N 3W
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| Posted: Thu Aug 18, 2005 11:34 am Post subject: |
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dmn,
Are the drives attached using a PCI bus?
lspci will show that.
What controller do you have?
43.89 MB/sec is just under half the theoretical PCI bus bandwidth, I would have suspected a little better from a 32 bit 33MHz PCI bus butu not a lot.
Is your SCSI bus properly terminated?
One terminator at each end and none in the middle of the wire and the last device plugged in at the end of the ribbon. SCSI is very fussy about little things like that.
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Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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