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HP XP P9500 Storage User Manual

Page 25

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The following table describes whether you can set attributes to the S-VOL or T-VOL of a Compatible
FlashCopy relationship by using other solutions.

Table 6 Compatibility of volumes shared by Compatible FlashCopy and security solutions

Compatible FlashCopy SE Volume

Compatible FlashCopy V2 Volume

Solutions

T-VOL (TSE-VOL)

S-VOL

T-VOL

S-VOL

This attribute cannot
be set.

This attribute can be
set.

This attribute can be
set.

This attribute can be
set.

Cache Residency

This attribute cannot
be set.

This attribute can be
set.

This attribute can be
set.

This attribute can be
set.

External Storage

This attribute cannot
be set.

This attribute can be
set.

This attribute can be
set.

This attribute can be
set.

Thin Provisioning Z

This attribute cannot
be set.

This attribute can be
set.

This attribute can be
set.

This attribute can be
set.

Smart Tiers Z

External volumes are the volumes in the external storage system that are mapped as the internal
volumes. For details about External Storage and external volumes, see the HP XP P9000
External Storage for Open and Mainframe Systems User Guide
.

If an external volume is specified as a Compatible FlashCopy T-VOL, be careful about the
setting of the time of path blockade watch, which is the time from when the external storage
system is disconnected to when the path is blocked. If the time of path blockade watch set for
the T-VOL is longer than the time of the MIH (Missing Interrupt Handler) timer which is set for
the S-VOL on the host side, MIH may occur on the S-VOL and the processing may end
abnormally when the external storage system is powered off or when failures occur.

If the host I/O to the S-VOL is more important than the host I/O to the T-VOL, make sure that
the time of the path blockade watch for the T-VOL is smaller than the time of the MIH timer,
which is set for the S-VOL. In this way, the Compatible FlashCopy relationship will be suspended
when the T-VOL is blocked because of the path blockade watch, therefore the host I/O to the
S-VOL can be maintained.

If the host I/O to the T-VOL and the T-VOL data are more important than the host I/O to the
S-VOL, use the default setting of the path blockade watch for the external volume that is to be
specified as the T-VOL.

The following table describes whether you can perform Reverse Restore and Fast Reverse Restore
on the S-VOL or the T-VOL of a Compatible FlashCopy pair to which attributes are set by other
solutions.

Table 7 Reverse Restore and Fast Reverse Restore when a Compatible FlashCopy volume is used
as volume of other solutions

Compatible FlashCopy SE Volume

Compatible FlashCopy V2
Volume

Solutions

T-VOL (TSE-VOL)

S-VOL

T-VOL

S-VOL

-

-

-

-

Protect attribute

Volume
Retention

OK

OK

OK

OK

Read enabled/Write disabled
attribute

OK

OK

OK

OK

Read/Write enabled attribute

-

OK

OK

OK

Cache Residency

-

OK

OK

OK

External Storage

Interoperability with other products and functions

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