Date: Tue, 16 Apr 2002 10:04:08 GMT From: msch@snafu.de To: Terry Lambert <tlambert2@mindspring.com> Cc: freebsd-current@freebsd.org Subject: Re: ATA errors on recent -current Message-ID: <E16xPom-0004cD-00@clever.eusc.inter.net>
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> [...] > Since you have one of these beasts, could you maybe try changing > the number of tagged command queue entries you permit to be used > at one time? Of course, I'll do it as soon as... 1) I'm at home again... ;-) 2) Someone tells me how to achive that. I looked at 'man 8 atacontrol' as well as 'man 4 ata', but I can't find anything that lets me set the queue depth nor inquire the advertised queue length... > [...] > As I said: it could be drive settings unrelated to the code > itself being correct. I've given three suggestions to verify > this, one way or the other: > > 1) Control the drive DMA speed down I *did* test with UDMA66 instead of UDMA100 and it was even worse... With UDMA100, the system switched back to PIO4 - with UDMA66 there was a system freeze after the second (well known) error message... :-( But I admit, this test was done some days ago, I'll try it again this evening (approx. 19:00 UTC)... > 2) Pretend the maximum tagged command queue depth is > smaller than it is How to? > 3) Toggle the write caching on the drive OK - I'm running all my disks without write cache, but I'll check this too. > Until you try all three of these and report back, you can't say > that the problem is Soren's. This is a real misunderstanding! I thought I stated clearly enough that I don't want to blame Soren for this obviously highly complex issue! Shit happens - the only ensurance against that is to stay in bed (alone! :-) Ciao/BSD - Matthias To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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