HP XP7 Storage - Manual (Page 186)

7 Data protection operations with RAID Manager
This chapter describes data protection operations using RAID Manager.
Data protection operations
User data files are normally placed on a disk through a software layer such as a file system, LVM,
disk driver, SCSI protocol driver, bus adapter, and SAN switching fabric. Data corruption can
happen due to software layer bugs or human error. RAID Manager Data Protection Facility does
not prevent these types of errors. On the other hand, the purpose of data protection is to prevent
writing to volumes that the RAID storage system is guarding.
Data protection functions include:
•
Data Retention
•
Volume Retention
•
Volume Security for Mainframe
•
DKA Encryption
•
Database Validator
Data Retention
The purpose of the Data Retention is to prevent writing to volumes that the RAID storage system is
guarding. Data Retention is similar to the command that supports Database Validator, setting a
protection attribute for the specified LU.
•
Hide from Inquiry command. The RAID storage system conceals the target volumes from the
SCSI Inquiry command by responding "unpopulated volume" (0x7F) to the device type.
•
SIZE 0 volume. The RAID storage system replies with "SIZE 0" to the target volumes through
the SCSI Read capacity command.
•
Read protection. The RAID storage system protects reading from the target volumes by
responding with the "Illegal function" check condition (SenseKey = 0x05, SenseCode =
0x2200).
•
Write protection. The RAID storage system replies with "Write Protect" in the mode sense
header, and protects from writing the target volumes by responding with the "Write Protect"
check condition (SenseKey=0x07, SenseCode=0x2700).
•
SVOL disabling.
The RAID storage system rejects the command execution of the copy series program product
for not to be overwritten the target volume by the copy process of copy series program product
(Continuous Access Synchronous/Continuous Access Journal/Business Copy/Snapshot), and
protects the target volume. This option can be used with the other Data Retention options in
parallel. For example, if you want to protect from the writing by the both copy series program
product and the host accessing, set the both write protection option and this option. Only the
setting of write protection option cannot protect the target volume from the writing executed
by the copy processing of the copy series program product.
186 Data protection operations with RAID Manager