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mr98ai
n00b
Joined: 12 Dec 2003
Posts: 44
Location: Ontario, Canada
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 Posted: Thu Nov 25, 2004 2:52 am Post subject: Check for DMA with raid |
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Hi, anybody know how I can detect if my 2 harddrives connected via a 3ware raid controller are using DMA? hdparm does not give me any usefull data... | Code: | root@corncob mr98ai # hdparm /dev/sda
/dev/sda:
HDIO_GET_MULTCOUNT failed: Invalid argument
readonly = 0 (off)
readahead = 256 (on)
geometry = 19458/255/63, sectors = 160050577408, start = 0
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genstef
Retired Dev
Joined: 13 Jun 2004
Posts: 668
Location: M/Bay/Germany
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| Posted: Thu Nov 25, 2004 11:05 am Post subject: |
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| You could try hdparm -i |
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mr98ai
n00b
Joined: 12 Dec 2003
Posts: 44
Location: Ontario, Canada
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| Posted: Thu Nov 25, 2004 11:35 pm Post subject: |
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When I run this test, I get these results. Is this good, or bad??
| Code: | hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 2068 MB in 2.00 seconds = 1033.12 MB/sec
Timing buffered disk reads: 140 MB in 3.03 seconds = 46.27 MB/sec
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Kernel & Hardware
