Rebooting redundant VIOs and mirroring of PVs they serve to client LPARs Post: 302968200

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Operating Systems AIX Rebooting redundant VIOs and mirroring of PVs they serve to client LPARs Post 302968200 by MichaelFelt on Saturday 5th of March 2016 04:52:42 AM

03-05-2016

Registered User

What was not clear to me is whether the storage was physically located.

It sounds like it was using local storage (local, i.e., physical, not from a SAN) and the LPAR (aka virtual machine) was using LVM mirroring.

This was the preferred (read almost only) solution in 2005 before SAN storage was common. HOWEVER, if you have SAN backed storage what is 'common' when you have local (i.e., in the CEC aka Compute node) storage is to use the local storage for rootvg, dvd repositories, secure logs, etc. and SAN and MPIO for hosting VM (or client LPAR) storage.

re: active/passive LVM mirroring: the consistency check was to help 'guess' which mirror was last written when recovering from a crash. In your case, while the VIOS was down, one path was down and it is clear which disk is stale and needs to be synced.

Over time, the disks will sync automatically - but you can speed the process by running syncvg (lsvg vgName will tell you if there are stale disks and if so, how many stale PP)

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LEARN ABOUT MINIX

repartit

REPARTITION(8)						      System Manager's Manual						    REPARTITION(8)

NAME

       repartition - load a partition table

SYNOPSIS

       repartition device [partition-file]

DESCRIPTION

       Repartition  uploads  a new partition table for the partitions of device.  The table is obtained from the first sector of partition-file if
       given, device otherwise.  Device may refer to the whole drive or a primary partition, depending on whether you want to upload  a  partition
       or a subpartition table.  The partitions will be truncated to fit within the enclosing device like the disk driver does, unless the numbers
       are coming from partition-file.

EXAMPLES

       repartition /dev/hd0
       repartition /dev/hd4 /etc/hd4.table

       Reload the partition table of drive 0 setting /dev/hd[1-4], and the subpartition table of /dev/hd4 setting /dev/hd4[a-d] using a file.  The
       latter may be useful if you need more than the 4 subpartitions a single Minix partition gives you.

DIAGNOSTICS

       The new table is printed on standard output.

FILES

       /dev/hd[0-9]

SEE ALSO

       hd(4), part(8).

BUGS

       The disk must be in use for the changes to stick.  The partition table of an idle disk will be reloaded on the first open.

AUTHOR

       Kees J. Bot (kjb@cs.vu.nl)

																    REPARTITION(8)