Date: Sat, 13 Sep 1997 03:14:28 +0200 From: Tor Egge <Tor.Egge@idi.ntnu.no> To: dkelly@hiwaay.net Cc: grog@lemis.com, hackers@FreeBSD.ORG Subject: Re: Do *you* have problems with floppies? Message-ID: <199709130114.DAA01842@pat.idi.ntnu.no> In-Reply-To: Your message of "Fri, 12 Sep 1997 05:53:34 -0500" References: <199709121053.FAA14361@nospam.hiwaay.net>
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> So this time I kicked off bonnie and got > > 51 pci irq9 (Adaptec 2940) > 21 fdc0 irq6 > blks 5245 (sd0, "SEAGATE ST32550N 0021") > > Processing EVEVEVEEVEVVVVEVVVVVEVVVVVVVVVVVVVVVVVVV done. > > The V's were in the "Reading intelligently..." phase. I have similar experiences when iozone is running in the background. MB is ASUS P65UP5. AHA2940 and AHA2940UW scsi controllers. Using fdformat gives the following output: Format 1440K floppy `/dev/rfd0.1440'? (y/n): y Processing VVVVVEVVVVVVEVVVVVVVEEVVVVVVVVVVVVVVVVVV done. with errors as: fd0c: hard error reading fsbn 420 of 414-431 (ST0 44<abnrml,top_head> ST1 4<sec_not_fnd> ST2 0 cyl 11 hd 1 sec 7) Aborting iozone and running fdformat -v (only verify) reproduces the same errors, indicating that bad contents was written to some of the sector headers on the disk during the format operation. with no scsi bus traffic, I was able to run fdformat 10 times in a row without encountering any errors. Disabling interrupts in fd_cmd and fd_read_status did not help. This indicates that `busy waiting' will not help. It looks very much like a DMA conflict or starvation. - Tor Egge
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