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J.M.I.T.
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Joined: 15 Jan 2003
Posts: 481
Location: München, Germany
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 Posted: Mon Mar 15, 2004 9:53 am Post subject: Promise SATA RAID vs VIA SATA RAID - performance |
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I've done some performance tests with my RAID0 setup... i did some hdparm benchmarking and got some interesting results...
The disks are Seagate Barracuda 160GB drives...
Promise SATA RAID0:
| Code: | hdparm -tT /dev/md0
Timing buffer-cache reads: ~750MB/s
Timing buffered disk reads: ~85MB/s |
VIA SATA RAID0:
| Code: | hdparm -tT /dev/md0
Timing buffer-cache reads: ~750MB/s
Timing buffered disk reads: ~105MB/s |
Can anyone confirm this, or did i fail to configure the Promise Controller correctly? I always thought that Promise would provide the better Disk-Controller
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srs5694
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Joined: 08 Mar 2004
Posts: 434
Location: Woonsocket, RI
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| Posted: Mon Mar 15, 2004 6:02 pm Post subject: |
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| I have no definitive information or ability to verify what you're seeing. (I can tell you that I get ~56MB/s from a Maxtor 80GB SATA drive on a VIA VT8237 Southbridge controller, according to hdparm.) I recall hearing something about how Seagate SATA drives can be a bit slow with some controllers. It's possible you're running into that issue. Unfortunately, I don't recall where I heard this, so I can't provide a solid pointer; but you might try a Web search, a Google Groups search, and/or a search on this forum. |
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Getrb
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Joined: 20 Jun 2003
Posts: 30
Location: Europe -> Sweden -> Lidköping
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| Posted: Mon Mar 15, 2004 9:19 pm Post subject: |
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When i was checking for mobo's i saw something like that also.
So i believe those numbers are in fact accurate.
The problem is rather in the promise driver.
Of course one may tweak buffer-settings and so on but as long as your using promise-drivers you'll probably get a better result by your VIA-controller.
What does there homepage have on this?
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blueworm
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Joined: 09 May 2003
Posts: 962
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| Posted: Thu May 13, 2004 11:55 am Post subject: |
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Have you tried these same tests but with raid 1?
I am curious to see what the results are, because since hdparm tests read speed nor write speed the results should be similar. |
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GentooBox
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Joined: 22 Jun 2003
Posts: 1168
Location: Denmark
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| Posted: Thu May 13, 2004 3:34 pm Post subject: |
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I have a Abit via K8T800 with AMD64 and 2 x WD 250 Gb 8 Mb cache
Normal harddisk:
# hdparm -tT /dev/scsi/host0/bus0/target0/lun0/disc
/dev/scsi/host0/bus0/target0/lun0/disc:
Timing buffer-cache reads: 2400 MB in 2.00 seconds = 1199.58 MB/sec
Timing buffered disk reads: 154 MB in 3.00 seconds = 51.27 MB/sec
With RAID 0:
# hdparm -tT /dev/md1
/dev/md1:
Timing buffer-cache reads: 2376 MB in 2.00 seconds = 1186.99 MB/sec
Timing buffered disk reads: 238 MB in 3.01 seconds = 79.03 MB/sec
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mb
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Joined: 25 Apr 2002
Posts: 355
Location: Hessen | .de
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| Posted: Thu May 13, 2004 6:52 pm Post subject: |
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some Raid0 vs. Raid1 numbers (Seagate ST3120026AS hd's)
Software Raid1 on VIA-SATA:
| Code: |
dparm -tT /dev/md1
/dev/md1:
Timing buffer-cache reads: 2780 MB in 2.00 seconds = 1389.52 MB/sec
Timing buffered disk reads: 100 MB in 3.03 seconds = 33.04 MB/sec
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Software Raid0 on VIA-SATA:
| Code: |
hdparm -tT /dev/md0
/dev/md0:
Timing buffer-cache reads: 2840 MB in 2.00 seconds = 1419.51 MB/sec
Timing buffered disk reads: 238 MB in 3.02 seconds = 78.74 MB/sec
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#mb
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mb4guns
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Joined: 04 Dec 2002
Posts: 300
Location: Netherlands
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| Posted: Thu May 13, 2004 7:41 pm Post subject: |
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Normal promise:
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/dev/sda3:
Timing buffer-cache reads: 2412 MB in 2.12 seconds = 1137.91 MB/sec
Timing buffered disk reads: 170 MB in 3.04 seconds = 56.00 MB/sec
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sys1: Dell inspiron 4100 PentiumIII-mobile@1000 512mb ATI Radeon mobility m6 30gig, gnomed |
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felixZhu
n00b
Joined: 13 May 2004
Posts: 8
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| Posted: Fri May 14, 2004 3:31 pm Post subject: How did you configure your Promise RAID card£¿ |
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Did you configure your Promise RAID card under kernel 2.6.x or 2.4.x?
Promise seems does not support kernel 2.6.x from https://forums.gentoo.org/viewtopic.php?t=171130&highlight=promise
If you confiured it under kernel 2.6.x,please contact me.I am very impatient to setup Promise FastTrack TX4000 on my AMD64 achitecture uses kernel 2.6.x.
Thanks very much. |
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Gentoo on AMD64
