Operating Systems Solaris Move root disk to new identical hardware Post 303040914 by hicksd8 on Saturday 9th of November 2019 04:59:56 AM
You don't say which version of Solaris this is. Please post your OS version.

Firstly, whilst it's up and running, and before you do anything with the existing system, make sure you know the hostid exactly!! If you move the root disk(s) and cannot get the original hostid, to set it you'll need to inject the required value into the kernel module. If you don't know what hostid you need at that time you are screwed.

Also, blatantly obvious thing to say I know is, you need to ensure that you are also moving the metadb (which is usually on a very small disk partition) otherwise SVM won't work on the new machine. If metadb is on a non-root disk then you'll have to move that too.

If the root disk is SVM mirrored then I guess you mean to move a pair of disks??

There's likely no EPROM on this hardware to allow you to move the NIC address, etc, and the hostid is hashed from the NIC address on SPARC hardware. So it's quite likely IMHO that you will need to forcibly change the hostid on the new box. The code to do that I posted on this forum a long time ago so you can search for it. REMEMBER THOUGH, that the code is different for SPARC vs X86 and both are published on here. Make sure you use the right method.

If you've been professional and have a full backup I don't see any harm in giving it a try.

(If you cannot find the relevant hostid discussion on this forum drop me (hicksd8) or moderator gull04 a PM and prompt one of us to post back on this thread. We know how to do this.)

Last edited by hicksd8; 11-09-2019 at 07:38 AM..
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addbadsec(1M)						  System Administration Commands					     addbadsec(1M)

addbadsec - map out defective disk blocks SYNOPSIS
addbadsec [-p] [ -a blkno [blkno...]] [-f filename] raw_device DESCRIPTION
addbadsec is used by the system administrator to map out bad disk blocks. Normally, these blocks are identified during surface analysis, but occasionally the disk subsystem reports unrecoverable data errors indicating a bad block. A block number reported in this way can be fed directly into addbadsec, and the block will be remapped. addbadsec will first attempt hardware remapping. This is supported on SCSI drives and takes place at the disk hardware level. If the target is an IDE drive, then software remapping is used. In order for software remapping to succeed, the partition must contain an alternate slice and there must be room in this slice to perform the mapping. It should be understood that bad blocks lead to data loss. Remapping a defective block does not repair a damaged file. If a bad block occurs to a disk-resident file system structure such as a superblock, the entire slice might have to be recovered from a backup. OPTIONS
The following options are supported: -a Adds the specified blocks to the hardware or software map. If more than one block number is specified, the entire list should be quoted and block numbers should be separated by white space. -f Adds the specified blocks to the hardware or software map. The bad blocks are listed, one per line, in the specified file. -p Causes addbadsec to print the current software map. The output shows the defective block and the assigned alternate. This option cannot be used to print the hardware map. OPERANDS
The following operand is supported: raw_device The address of the disk drive (see FILES). FILES
The raw device should be /dev/rdsk/c?[t?]d?p0. See disks(1M) for an explanation of SCSI and IDE device naming conventions. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Architecture |x86 | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
disks(1M), diskscan(1M), fdisk(1M), fmthard(1M), format(1M), attributes(5) NOTES
The format(1M) utility is available to format, label, analyze, and repair SCSI disks. This utility is included with the addbadsec, diskscan(1M), fdisk(1M), and fmthard(1M) commands available for x86. To format an IDE disk, use the DOS "format" utility; however, to label, analyze, or repair IDE disks on x86 systems, use the Solaris format(1M) utility. SunOS 5.10 24 Feb 1998 addbadsec(1M)

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