On Wed, 01 Jan 2003 11:12:06 -0500 Mark Weaver <[EMAIL PROTECTED]> wrote:
> Pierre Fortin wrote: > > On Wed, 01 Jan 2003 01:25:12 -0500 Mark Weaver > > <[EMAIL PROTECTED]> wrote: > > > > > >>g wrote: > >> > >>>Mark Weaver wrote: > >>> > >>> > >>> > >>>>Thank you g! this looks like fun. I'm going to try this and see what > >>>>happens. I've been doing all the backup to scsi tape using tar > >before>> > >>>this. > >>> > >>> > >>>you are most welcome. i hope you can get some mileage from scripts. > >>> > >>>cpio works very well for tape archive. i started using cpio w/ basic > >>>scripts in mid 70's for backing up 10 and 20 meg hdd's and has yet to > >>>fail. > >>> > >>>'testscript' is best done to insure you are getting what you want > >from>>'find'. > >>> > >>>with find and grep, cpio even does a fine batch/conditional file > >>>transfer. > >>> > >>> > >>>peace out. > >>> > >>>tc,hago. > >>> > >>>g > >> > >>g, > >> > >>I've got one more question. The other evening I was mucking about > >>working some kinks out of my backup script and I think I "over-filled" > > > >>the tape. When it got full, of course, it started returning a lot of > >>errors to the console, and now I can't get it to run at all. > >> > >>When I try to run it from the command line I'm getting this returned > >to >the console: > >> > >>tar: /dev/st0: Cannot open: No such device or address > >>tar: Error is not recoverable: exiting now > >>tar: /dev/st0: Cannot open: No such device or address > >>tar: Error is not recoverable: exiting now > >> > >>I got to diggin around in the log files and found this: > >> > >>[root@mdw1982 root]# grep scsi /var/log/messages > >>Dec 29 14:57:26 mdw1982 kudzu: aliased scsi_hostadapter as aha1542 > >>Dec 29 15:01:34 mdw1982 kernel: scsi0 : Adaptec 1542 > >>Dec 29 15:01:36 mdw1982 kernel: Attached scsi tape st0 at scsi0, > >channel> > >>0, id 1, lun 0 > >>Dec 31 00:33:02 mdw1982 kernel: Sent BUS RESET to scsi host 0 > >>Dec 31 00:33:12 mdw1982 kernel: scsi: device set offline - command > >error> > >>recover failed: host 0 channel 0 id 1 lun 0 > >>Dec 31 06:56:36 mdw1982 kernel: scsi0 : Adaptec 1542 > >>Dec 31 06:56:36 mdw1982 kernel: scsi : 0 hosts left. > >>Dec 31 06:59:36 mdw1982 kernel: scsi0 : Adaptec 1542 > >>Dec 31 06:59:38 mdw1982 kernel: Attached scsi tape st0 at scsi0, > >channel> > >>0, id 1, lun 0 > >>Dec 31 11:16:58 mdw1982 kernel: scsi: device set offline - command > >error> > >>recover failed: host 0 channel 0 id 1 lun 0 > >> > >>I've tried reloading the module for the device, but to no avail. It > >>appears from the log entries that it got disabled some how when the > >>kernel received the errors from the hardware, and I haven't a clue as > >to> > >>how to re-enable it. I've tried rebooting the machine, but that didn't > > > >>help either. I'm sorta stumped here. Any ideas? > >> > >>thanks, > >> > >>Mark > > > > > > > > If the bus reset isn't taking, you may have to power off the device > > for it to reset... I've had some luck at just pulling the power > > connector from hung scsi devices if they aren't in external boxes with > > their own power switch; but its also easy to hang a Linux box via > > scsi... > > > > HTH, > > Pierre > > Hi Pierre, > > That thought has been nagging at the back of my mind. I was waiting to > see if anyone confirmed it and you have. It's a shame there isn't a way > to reset them via software. I've noticed on the one Netware machine at > work that when there's a hardware problem with on of the scsi interfaces > The bus reset *should* have done the job; but I don't recall the h/w details of the reset... there may be a flaw in the code that no one has nailed down yet... Back on 11/11/02, I was working with my scsi scanner and managed to lock-up Linux tighter than a heated drumskin... clearly an indication of a permanent status that the code synchronously loops on without the benefit of a watchdog timer... :^P > the only thing that helps is a powerdown and restart. Is this peculiar > to scsi devices? > > Mark Nope... remember... various bus devices can be setup under one OS and assumed setup when another OS is started (most machines have an option in the BIOS to [not] reset them... The general issue of 'reset' is fraught with h/w-h/w and h/w-s/w interdependencies, resulting in lots of sighs... Pierre
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