Restrictions On Data Retention Utility Volumes - Hitachi VSP F1500 User And Reference Manual

Restrictions on Data Retention Utility volumes

• File systems using Data Retention Utility
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¢
¢
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• LVM(VxVM) on Data Retention Utility
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• Data Retention Utility in HA Cluster Server
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• Dynamic disk on Windows systems
¢
• LUN#0
¢
Database Validator
Database Validator prevents data corruption in an Oracle database by
checking Oracle data validation before an Oracle data block is written on a
disk.
• Data Block corruption: This occurs when Oracle data is corrupted by some
intervening software layer and/or hardware components. The RAID
storage system can check the validity of the data block before the Oracle
data block is written to disk.
When setting DRU to the UNIX file system volumes, the volumes must
be mounted with the Read Only option after the volumes are
unmounted. If DRU is set to the volumes as they are in the mounted
status, unexpected behavior or errors might occur in the system.
When using a file system for Write Protect Mode set disk on Windows
Server 2003/Windows Server 2008/Windows Server 2012, use the "-x
mount" and "-x umount" CCI command options with the above
mentioned procedures.
Data Retention Utility volumes set to Write Protect Mode (Read ONLY)
cannot be used for the Windows NT/Windows 2000 file system (NTFS,
FAT).
In a configuration with NAS modules installed, do not set Data
Retention Utility in a file system volume used by a NAS module. If you
do, unexpected behavior or errors might occur in the system.
If changing LVM configuration including Data Retention Utility, use the
raidvchset -vg command for setting the status of the target volume
checking prohibited temporarily. Also, after the completion of LVM
configuration change, set again the status as checking.
If HA Cluster software writes to the metadata at regular intervals to
confirm whether its disks are available or not, then Data Retention
Utility should not be used in HA environments.
Data Retention Utility volumes cannot be used for the dynamic disk,
because the dynamic disk does not handle the volumes set to Write
Protect Mode (Read ONLY). Data Retention Utility volumes must be
used for basic disks only.
Some operating systems cannot recognize LUNs over LUN#1 if LUN#0
has the Data Retention Utility "inv" attribute set. This is because some
HBA drivers do not scan all LUNs on a port if LUN#0 is invisible.
Data protection operations with CCI
Command Control Interface User and Reference Guide
7-3