Disks moved and making file domains

[Alice Daniel]

My DS20 has been hardware configured such that a custom device is on SCSI bus -> DKA (where the disks used to be) and my 2 disks are now on DKB. Originally my fstab entries were relative to rz0 and rz1 --> dka, but now, the disks have been renamed to rz8 and rz9 respectively.
Right now when I reboot, I am not able to mount the disk partitions properly, so I cant rebuild the system, because /usr is not found on the new disk name (rz8) . What needs to be done to get /usr (originally on partition rz0g) along with /swap on rz0b) mounted or accessed properly WITHOUT loosing any data on those disks?

[Ivan Ferreira · Accepted solution]

If you can boot to single user mode:

>>> boot -fl s

You can change the links in the /etc/fdmns/ directory. Create a new link pointing to the right device with ln -s. Ensure that you specify the same ending letter (partition, like rzXa, rzXg, rzXh)

Example:

cd /etc/fdmns/usr_domain
ln -sf /dev/rz8h

For the swap device, you should change it on /etc/fstab.

[Alice Daniel]

I tried that, but I got:

/rz8h: Read-only file system

[Alice Daniel]

Also, this is how my /etc/fdmns directory looks:

-r--- 1 root system 0 ... .advfslock_fdmns
-r--- 1 root system 0 ... .advfslock_usr_domain


drwxr-xr-x 2 root system ... root_domain
drwxr-xr-x 2 root system ... usr_domain

I tried to change the permissions for the lock files, but got the :read-only file system msg again.

[Hein van den Heuvel]

After you booted a 4.0 system in snadalone mode you can make the root file system modifyable by executing:

mount -u

Hein.

[Ivan Ferreira]

I forgot to methion that you need to run:

mount -u /

To make / rw.

[Alice Daniel]

should I get rid of the existing link of rz0h -> /dev/rz0g ?

[Ivan Ferreira]

Just remove the file, and keep a record on some notepad just in case.

[Alice Daniel]

Thanks to all that replied. I also had to reset the /sbin/swapdefault... I can now boot!