Subject: Soft Errors / DMA errors on IBM 18G ATAPI disk
To: None <port-i386@netbsd.org>
From: Mike Cheponis <mac@Wireless.Com>
List: port-i386
Date: 10/17/1999 09:01:15
I installed 1.4.1 on an IBM 18G disk into a 2G partition.  Then I gave the
disk to a friend to install into his machine.  (Both machines are K6-2/450
MHz w/64 MB, but are otherwise not identical motherboards).


Here are some messages from his log:


Oct 15 12:02:08 USB /netbsd: wd0 at pciide0 channel 0 drive 0: <IBM-DJNA-371800>
Oct 15 12:02:08 USB /netbsd: wd0: drive supports 16-sector pio transfers, lba addressing
Oct 15 12:02:08 USB /netbsd: wd0: 17206MB, 16383 cyl, 16 head, 63 sec, 512 bytes/sect x 35239680 sectors
Oct 15 12:02:08 USB /netbsd: wd0: 32-bits data port
Oct 15 12:02:08 USB /netbsd: wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 4, Ultra-DMA mode 3, Ultra-DMA mode 2
Oct 15 12:02:08 USB /netbsd: wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2 (using DMA data transfers)

....

Oct 16 15:10:37 USB syslogd: restart
Oct 16 15:10:38 USB /netbsd:  tn 7 sn 54), retrying
Oct 16 15:10:38 USB /netbsd: wd0: soft error (corrected)
Oct 16 15:10:38 USB /netbsd: wd0a: DMA error reading fsbn 114288 of 114288-114319 (wd0 bn 114351; cn 113 tn 7 sn 6), retrying
Oct 16 15:10:38 USB /netbsd: wd0: soft error (corrected)
Oct 16 15:10:38 USB /netbsd: wd0a: DMA error reading fsbn 85088 of 85088-85103 (wd0 bn 85151; cn 84 tn 7 sn 38), retrying
Oct 16 15:10:39 USB /netbsd: wd0: soft error (corrected)
Oct 16 15:10:39 USB /netbsd: wd0a: DMA error reading fsbn 85104 of 85104-85119 (wd0 bn 85167; cn 84 tn 7 sn 54), retrying
Oct 16 15:10:39 USB /netbsd: wd0: soft error (corrected)

[... many more of those ...]


He gets many many of these "soft errors".  But it makes the system unusable.

It worked perfectly on my machine.

Any ideas?  (We have not re-verified the disk is still OK by putting it
back in my machine, though.)

thanks -Mike Cheponis