Messages in this thread | ![/](/images/icornerl.gif) | | From | Bartlomiej Zolnierkiewicz <> | Subject | Re: [PATCH] [2.4.XX] Silicon Image/CMD Medley Software RAID | Date | Tue, 7 Oct 2003 16:42:59 +0200 |
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Hi Tigran,
IMO Silicon Image is a good hardware.
On Tuesday 07 of October 2003 16:02, tigran@aivazian.fsnet.co.uk wrote: > Hi Thomas, > > While we are on the subject of Silicon Image hardware, I wanted to ask --- > is this normal that this hardware (boxed as "EIO AP-1680 IDE RAID card"), > see this URL for more info): > > http://www.ivmm.com/eio/products_ap1680.html > > so horrendously slow, without even using any of its RAID functions (which > would be slow understandably as they are software RAID)? > > Numbers. My IDE drives perform 22-25M/sec (hdparm -t) when connected > to the onboard IDE controller (6BXD SMP motherboard, old, 2xPIII550, 1G > RAM) but when connected to this RAID card and used as plain physical disks > (no RAID sets configured) they give 2M/sec using DMA and 4M/sec when I > disable DMA.
What kernel version? dmesg please.
> I see many people mentioning Silicon Image hardware here, so I assumed > it is a useable hardware, but if everyone is getting 2M/sec (or 4M/sec and > hog the whole system performance with PIO!) then am I the first one who > noticed that the king is, in fact, naked? Shouldn't I expect a decent > 20-25M/sec hdparm -t from the drives connected to the additional IDE card > (be it RAID or no RAID, just extra IDE slots)?
There is a rqsize limit problem with SiI SATA controllers (please search archive for discussion), but ATA shouldn't be affected.
--bartlomiej
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