Recover failed system disk Post: 302966276

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Operating Systems Solaris Recover failed system disk Post 302966276 by jj5406 on Wednesday 10th of February 2016 02:38:48 PM

02-10-2016

Registered User

Recover failed system disk

I have an oldish Solaris 10 system (SunFire x4240), which due to a recent heating event in the server room, lost it's system disk.

I have rsync backups of all the other (data) disks, but apparently I do not have a backup of /. :-( I can start the machine up in failsafe mode, but running fsck on the system disk always reports a couple of bad sectors, which I don't seem to be able to repair or ignore (tried format->analyze->read, etc.).

It looks like I can mount the disk read only, so I'm hoping I can copy most of the pertinent info off of it, install Solaris 10 on a fresh replacement disk, and then copy that pertinent system info back onto the new system so that I don't have to recreate network info, users, disk mounts, NIS info, and various other things from scratch.

Once I have the fresh OS installed on a new disk, is it safe to mount the failed disk read-only and use rsync to copy the accessible files on that disk to a safe location - or is there a better way to do this?

Thanks.

-J

---------- Post updated at 02:38 PM ---------- Previous update was at 10:07 AM ----------

I installed Solaris 10 on the new disk, but now I'm wondering how best to get the files I want off of the old disk. The system has 16 SAS bays, they are as follows:

0: new system disk
1-3: single-volume disks
4-15: RAID 5 array

All bays are filled.

The raid controller knows about all the disks, but the new system does not (yet), though I can easily mount the single-volume disks. The question is: can I turn off the computer, swap out one of the single-volume disks for the bad disk, and then power up and mount the bad disk and copy files off of it - without irrevocably screwing up the raid-controller's knowledge of the disk I pulled out to make space for the bad disk?

Thanks.

-J

jj5406

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LEARN ABOUT PLAN9

install-solaris

install-solaris(1M)													       install-solaris(1M)

NAME

       install-solaris - install the Solaris operating system

SYNOPSIS

       install-solaris

       install-solaris	invokes  the  Solaris  Install	program. Depending on graphical capability and available memory at the time of invocation,
       install-solaris invokes either a text-based installer or a graphical installer.

       The following minimum requirements for physical memory dictate which features are available during installation:

       For SPARC machines:

       128 MB

	   Minimum physical memory for all installation types

       128 MB

	   Minimum physical memory required for windowing system

       384 MB

	   Minimum physical memory required for graphical-based installation

       For x86 machines:

       256 MB

	   Minimum physical memory for all installation types

       256 MB

	   Minimum physical memory required for windowing system

       512 MB

	   Minimum physical memory required for graphical-based installation

       In some cases, even if the minimum physical memory is present, available virtual memory after system startup can limit the number  of  fea-
       tures available.

       install-solaris	exists	only  on  the Solaris installation media (CD or DVD) and should be invoked only from there. Refer to the  for more
       details.

       install-solaris allows installation of the operating system onto any standalone system. install-solaris loads the software available on the
       installation media. Refer to the  for disk space requirements.

       Refer to the  for more information on the various menus and selections.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcdrom  (Solaris instal-  |
       |			     |lation media)		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

       pkginfo(1), install(1M), pkgadd(1M), attributes(5)

       It is advisable to exit install-solaris by means of the exit options in the install-solaris menus.

								    23 Sep 2005 					       install-solaris(1M)