HP 3PAR StoreServ 7450 Storage Troubleshooting Guide

Displays Logical Disks (LDs) that are not optimal:

• Checks for preserved LDs

• Checks that current and created availability are the same

• Checks for owner and backup

• Checks that preserved data space (pdsld) is the same as total data cache

• Checks size and number of logging LDs

Format of Possible LD Exception Messages

LD ld:<ldname> "LD is not mapped to a volume"

LD ld:<ldname> "LD is in write-through mode"

LD ld:<ldname> "LD has <X> preserved RAID sets and <Y> preserved chunklets"

LD ld:<ldname> "LD has reduced availability. Current: <cavail>, Configured: <avail>"

LD ld:<ldname> "LD does not have a backup"

LD ld:<ldname> "LD does not have owner and backup"

LD ld:<ldname> "Logical Ddisk is owned by <owner>, but preferred owner is <powner>"

LD ld:<ldname> "Logical Disk is backed by <backup>, but preferred backup is <pbackup>"

LD ld:<ldname> "A logging LD is smaller than 20G in size"

LD ld:<ldname> "Detailed State:<ldstate>" (degraded or failed)

LD -- "Number of logging LD's does not match number of nodes in the cluster"

LD -- "Preserved data storage space does not equal total node's Data memory"

LD Example 1

Component -------Description-------- Qty

LD LDs not mapped to a volume 10

Component -Identifier-- --------Description---------

LD ld:Ten.usr.0 LD is not mapped to a volume

LD Suggested Action 1

Examine the identified LDs using CLI commands such as showld, showld –d, showldmap,

showvvmap, and other such commands.

LDs are normally mapped to (used by) VVs but they can be disassociated with a VV if a VV is

deleted without the underlying LDs being deleted, or by an aborted tune operation. Normally, you

would remove the unmapped LD to return its chunklets to the free pool.

cli% showld Ten.usr.0

Id Name RAID -Detailed_State- Own SizeMB UsedMB Use Lgct LgId WThru

MapV

88 Ten.usr.0 0 normal 0/1/2/3 8704 0 V 0 --- N

cli% showldmap Ten.usr.0

Ld space not used by any vv

38 Troubleshooting