firewire disks
Les Mikesell
les at futuresource.com
Mon Aug 23 19:43:25 UTC 2004
I see there has been some discussion of firewire problems in the list
archives but I can't find any real resolution or current status. I'm
trying to do online backups with backuppc to a software raid set
consisting of one partition on an internal IDE and one on an
external firewire drive, then periodically rotate the external
disk offsite and re-sync to a different one. The raid activity
is generally irrelevant to the problems I have had except that
since the external drive isn't detected during the boot sequence
any reboot starts the raid in degraded mode and requires a full
re-sync (7 to 8 hours for 250 gigs...) to restore the mirror This has
been tolerable so far because the filesystem can be used anyway.
I have been able to use the drive only under the following
circumstances:
running FC1 (currently kernel 2.4.22-1.2199.nptl)
manually modprobe ohci1394 and sbp2
echo "scsi add-single-device 0 0 0 0" > /proc/scsi/scsi
It doesn't work with any of:
A different brand of ie1394 card.
A 'real' scsi device in the machine.
FC2 (any kernel I've tried).
Reconnecting a disk without rebooting.
In most of the failure cases the drive shows up under
/proc/bus/ieee1394/devices but not as a scsi device.
I've tried a couple of the re-probe-scsi scripts I've
found on the net with no luck.
Any advice?
---
Les Mikesell
les at futuresource.com
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