How to reclaim hard disks and IP's in AIX? Post: 302989432

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Operating Systems AIX How to reclaim hard disks and IP's in AIX? Post 302989432 by bakunin on Thursday 12th of January 2017 10:37:05 AM

01-12-2017

Registered User

Quote:

Originally Posted by Joseph Sabo

Now, since the file systems belong to a Volume group I am assuming I would need to take the VG offline and remove the file systems via smitty. Since the disk belongs to a SAN, I would need to remove the disk definition from ODM and erase the path.

In AIX all (really all) filesystems are managed by a logical volume manager. As a rule of thumb you have:

- one or more filesystems belong to a volume group
- one or more disks provide the space for this volume group (each disk belongs to exactly one VG)

If a system is set up sensibly volume groups build logical groups of FSes, i.e. all FSes for one application are in one VG. Therefore you most probably want to remove all FSes from one VG.

If so:

- lsvg -p to get the disks belonging to the VG (man lsvg). Write these down.
- umount all the FSes in question.
- varyoff the VG after unmounting all the FSes in it. (man varyoffvg)
- export the VG (man exportvg)

The last command will remove the FS definitions from /etc/filesystems as well as the VG. Finally you can remove the disk(s) which (formerly) belonged to the VG:

- rmdev -Rdl <disk> (man rmdev)

Afterwards remove the zoning/LUNs and it might be necessary to remove the disks from the VIOS too (if they are vSCSI).

Finally do a cfgmgr on teh LPAR to make sure the disks are out of the system cleanly (if some artefacts are configured again you know you have more work to do).

Note, that there was a lot of assuming going on when writing this. In principle the procedure will cover the most common cases but you might have to change details for i.e. EMC SAN running PowerPath drivers, etc., so as long as we have no detailed description of your system we can#t tell you in all detail what to do and how.

I hope this helps.

bakunin

bakunin

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LEARN ABOUT SUSE

diskscan

diskscan(1M)						  System Administration Commands					      diskscan(1M)

NAME

       diskscan - perform surface analysis

SYNOPSIS

       diskscan [-W] [-n] [-y] raw_device

DESCRIPTION

       diskscan  is used by the system administrator to perform surface analysis on a portion of a hard disk. The disk portion may be a raw parti-
       tion or slice; it is identified using its raw device name. By default, the specified portion of the  disk  is  read  (non-destructive)  and
       errors  reported  on standard error. In addition, a progress report is printed on standard out. The list of bad blocks should be saved in a
       file and later fed into addbadsec(1M), which will remap them.

OPTIONS

       The following options are supported:

       -n	Causes	diskscan to suppress linefeeds when printing progress information on standard out.

       -W	Causes diskscan to perform write and read surface analysis. This type of surface analysis is destructive  and  should  be  invoked
		with caution.

       -y	Causes	diskscan to suppress the warning regarding destruction of existing data that is issued when  -W is used.

OPERANDS

       The following operands are supported:

       raw_device      The address of the disk drive (see FILES).

FILES

       The raw device should be /dev/rdsk/c?[t?]d?[ps]?. 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

       addbadsec(1M), disks(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 diskscan, addbad-
       sec(1M), fdisk(1M), and fmthard(1M) commands available for x86. To format an IDE disk, use the  DOS format utility; however, to label, ana-
       lyze, or repair IDE disks on x86 systems, use the Solaris format(1M) utility.

SunOS 5.10							    24 Feb 1998 						      diskscan(1M)