Hi,

Separately from using RAID or maxing out the proc table or memory, I can 
lock up the SCSI bus on this NetBSD 2.0 system by simply starting a newfs 
on three drives at once.

The system itself doesn't lock up, and this is what I get while rebooting:

Aug 11 18:41:12 lain shutdown: reboot by john:
Aug 11 18:41:23 lain syslogd: Exiting on signal 15
syncing disks... 18451 18451 18451 18451 18451 18451 18451 18451 18451 18451 184
51 18451 18451 18451 18451 18451 18451 18451 18451 18451 giving up
sd2: cache synchronization failed
sd1: cache synchronization failed
sd0: cache synchronization failed
rebooting

It doesn't happen when just newfs'ing two drives at the same time.

Here is all of the SCSI information:

esiop0 at pci2 dev 2 function 0: Symbios Logic 53c1010-33 (ultra3-wide scsi)
esiop0: using on-board RAM
esiop0: interrupting at irq 52
scsibus0 at esiop0: 16 targets, 8 luns per target
esiop1 at pci2 dev 2 function 1: Symbios Logic 53c1010-33 (ultra3-wide scsi)
esiop1: using on-board RAM
esiop1: interrupting at irq 52
scsibus1 at esiop1: 16 targets, 8 luns per target
...
sd0 at scsibus0 target 0 lun 0: <ATA, Maxtor   7Y250P0, YAR4> disk fixed
sd0: 233 GB, 121586 cyl, 64 head, 63 sec, 512 bytes/sect x 490234752 sectors
sd0: sync (12.50ns offset 14), 16-bit (160.000MB/s) transfers, tagged queueing
sd1 at scsibus0 target 1 lun 0: <ATA, Maxtor   7Y250P0, YAR4> disk fixed
sd1: 233 GB, 121586 cyl, 64 head, 63 sec, 512 bytes/sect x 490234752 sectors
sd1: sync (12.50ns offset 14), 16-bit (160.000MB/s) transfers, tagged queueing
sd2 at scsibus0 target 2 lun 0: <ATA, Maxtor   7Y250P0, YAR4> disk fixed
sd2: 233 GB, 121586 cyl, 64 head, 63 sec, 512 bytes/sect x 490234752 sectors
sd2: sync (12.50ns offset 14), 16-bit (160.000MB/s) transfers, tagged queueing
sd3 at scsibus0 target 3 lun 0: <ATA, Maxtor   6Y250P0, YAR4> disk fixed
sd3: 233 GB, 121586 cyl, 64 head, 63 sec, 512 bytes/sect x 490234752 sectors
sd3: sync (12.50ns offset 14), 16-bit (160.000MB/s) transfers

It looks like 2.0 isn't ready for prime time yet, at least not on macppc.

Any thoughts? Suggestions?

John Klos