07-01-2002
Move hard disk to another SCSI host
I was using an external SCSI disk on a Sun Ultra60 (Solaris 7) as the boot device. It was labelled c1t0d0. I then moved it into the internal removable mounts and it should become c0t0d0, but it apparently didn't change properly. When the machine boots, it gets host information from the disk (because it tells me its name) and forces me into single user mode, saying it "can't stat" the filesystem at c0t0d0s0. At that point, running format says that it can't find any disks. I look in /dev/dsk and there are slices for the CDROM and slices for c1t0d0, but I can't mount either c0t0d0s0 or c1t0d0s0. It says that neither exist. The probe-scsi command at the 'ok' prompt says the disk is there. When I boot from the CD into single user mode, I can mount c0t0d0s0 with no problems. I've tried setting the disk label from the format prompt and I've also made sure that the firmware points to the correct boot device. Also, I did run the 'boot -r' from the 'ok' prompt and while in the CD single user mode, I put a /reconfigure file at root. One more thing I made sure of was that the /etc/vfstab entries had the "c0t0d0" for all slices. Nothing has helped. Any ideas?
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WREN(3) Library Functions Manual WREN(3)
NAME
wren, ata - hard disk interface
SYNOPSIS
bind #H[drive] /dev
bind #w[target[.lun]] /dev
/dev/hd0disk
/dev/hd0partition
/dev/sd0disk
/dev/sd0partition
...
DESCRIPTION
The hard disk interfaces (wren, #w, is a SCSI disk; ata, #H, is an IDE or ATA disk) serve a one-level directory giving access to the hard
disk partitions. The parameter to attach defines the numerical SCSI target and logical unit number or the IDE drive number to access.
Both default to zero.
Each partition name is prefixed by hd and the numeric drive identifier. The partition always exists and covers the entire disk. The size
of each partition as reported by stat(2) is the number of bytes in the partition, so the size of is the size of the entire disk.
The partition also always exists; it is the last block on the disk for SCSI, second to last for IDE. If it contains valid partition data,
those partitions will be visible as well. Every time the device is bound, the partitions are updated to reflect any changes in the parti-
tion file.
The format of the partition file is the string
plan9 partitions
on a line, followed by partition specifications, one per line, consisting of a name and textual strings for the block start and limit for
each partition on the disk.
The program prep(8) writes the partition table for the disk; its use is preferred to writing it by hand.
SEE ALSO
prep(8), scsi(3)
SOURCE
/sys/src/9/port/devwren.c
/sys/src/9/pc/devata.c
WREN(3)