Restrictions On Data Retention Utility Volumes - Hitachi TAGMASTORE MK-90RD011-25 User Manual

2.7.4

Restrictions on Data Retention Utility Volumes

File systems using Data Retention Utility (Open LDEV Guard)
When using the UNIX file system volumes as the DRU/Open LDEV Guard, the volumes
–
must be mounted with Read Only option by setting the DRU/Open LDEV Guard after
the volumes are unmounted.
In case of Windows 2003/2008 file system, you have to use "-x mount" and "-x
–
umount" option of CCI commands with above procedures.
DRU/Open LDEV Guard volumes set to Write Protect Mode (Read ONLY) cannot be
–
used for the file system (NTFS, FAT) on Windows OS.
LVM (VxVM) on Data Retention Utility (Open LDEV Guard)
When operating the LVM volumes to be used by DRU/Open LDEV guard, LVM
–
commands may be writing the volumes, and then DRU/Open LDEV Guard should be
re-enabled.
Data Retention Utility (Open LDEV Guard) in HA Cluster Server
If HA Cluster software will be writing to the metadata at regular intervals in order to
–
confirm whether its disks are available or not, then DRU/Open LDEV Guard should
not be used in HA environments.
Dynamic disk on Windows systems
DRU/Open LDEV Guard volumes cannot be used to the dynamic disk, because the
–
dynamic disk does not handle the volumes set to Write Protect Mode (Read ONLY).
DRU/Open LDEV Guard volumes must be used for the Basic disk only.
LUN#0
Some operating systems cannot recognize LUNs over LUN#1, if LUN#0 is set to the
–
"inv" as the attribute of DRU/OpenLDEV Guard. This is because some HBA drivers do
not scan all LUNs on a port, if LUN#0 is invisible.
Hitachi Command Control Interface (CCI) User and Reference Guide 43