Bret Hughes wrote:
On Mon, 2003-08-18 at 15:46, Douglas Phillipson wrote:Remember I'm booted on the RH recovery CD so it is a minimul version of Linux. The tape device is not there, /dev/st? and /dev/tape. a cat of /proc/scsi/scsi shows the tape on SCSI id 6 but when loading the "st" module and making the device node nothing happens. The device node gets made and it is a character device at 9,0 as it is when fully booted in RH but when accessing it with mt -f /dev/st0 I just get a "No such device" error.
I recently posted a question concerning attaching a DLT tape drive to a Dell 2650 running RH AS 2.1. The eventual solution was to install the OS with the tape drive attached because I couldn't get it to be recognized by adding it after the install.
In a related situation I've backed up the server with dump and have a DLT with all the partitions backed up. I then proceeded to rm -r /usr and attempt to restore the /usr partition. (server is not on line yet) I found that when booting the RH AS 2.1 CD and selecting the "recovery" mode, it nicely mounts the partitions for me under /mnt/sysimage but I have no access to the tape drive as the device is missing (/dev/st0). I've tried "insmod st" and "mknod /dev/st0 c 9 0" and I get no errors but the tape device doesn't seem to be there. How do those of you running servers do bare metal backup and restore?
I have always reinstalled from cd and then done the restore. Mind you,
I have never had this happen to a system partition in the wild, only during testing. Im my case I now use amanda and use amrestore, ir is it
amrecover, to actually do the restore. I also have it setup to use tar
so I am not dump literate.
Having said all this there has to be something that can access the tape:
is the device /dev/st0 really missing? by default, mt and alot of other tape utils default to /dev/tape which is symlinked to /dev/st0 on my machine.
[EMAIL PROTECTED] bhughes]$ ll /dev/tapeDmesg shows a "DLT1" device of the SCSI bus but there is no reference to a tape device.
lrwxrwxrwx 1 root root 8 Oct 25 2002 /dev/tape ->
/dev/st0
[EMAIL PROTECTED] bhughes]$ ll /dev/st0
crw-rw---- 1 root disk 9, 0 Apr 11 2002 /dev/st0
[EMAIL PROTECTED] bhughes]$
My /var/log/dmesg has the following :
scsi0 : sym53c8xx-1.7.3c-20010512 scsi1 : sym53c8xx-1.7.3c-20010512 blk: queue c3692618, I/O limit 4095Mb (mask 0xffffffff) Vendor: DEC Model: DLT2000 15/30 GB Rev: 840B
and later:
st: Version 20030406, bufsize 32768, max init. bufs 4, s/g segs 16 Attached scsi tape st0 at scsi1, channel 0, id 6, lun 0
[EMAIL PROTECTED] root]# mt status
mt status shows "no such device"
SCSI 2 tape drive: File number=0, block number=1, partition=0. Tape block size 0 bytes. Density code 0x19 (DLT 10GB). Soft error count since last status=0 General status bits on (1010000): ONLINE IM_REP_EN
What do you get?
Bret
I also tried booting a SuSE CD and I can see the tape drive with it but I can't mount the darn partitions with "mount -t ext3 /dev/sda7 /mnt" The device is there but it says "not a proper block device". I've also tried "timos", a nice version of Linux for recovery purposes and it recognizes the RAID and SCSI controllers and the DLT tape but consistantly hangs during the boot process so I never get a command prompt.
I can't seem to get there from here... Any help is greatly appreciated.
Perplexed
Doug P
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