Hp XP20000XP24000 Disk Array Instrukcja Użytkownika Pobierz pdf (Strona 28)

Table 10 Pool-VOL Requirements

Item

Requirement

Volume type

Logical volume

(LDEV)

Note:

Separating normal volumes and pool-VOLs into different parity groups is

recommended f

or best performance.

You cannot spe

cify the following volumes as XP Thin Provisioning Pool-VOLs:

• Volumes used b

y Business Copy, Auto LUN, Continuous Access, Continuous

Access Asynch

ronous, or Continuous Access Journal

• LUSE volumes

• Volumes deﬁn

ed by Cache Residency Manager

• Volumes alr

eady registered in pools for XP Snapshot or XP Thin Provisioning

• Volumes use

d as an XP Snapshot P-VOL or S-VOL

• Data Retent

ion Utility volumes with a Protect, Read Only, or S-VOL Disable

attribute

• Volumes cr

eated by External Storage

• Volumes w

hose LDEV attribute is not NORMAL

• External

volumes

Emulation type

OPEN-V

RAID level

All RAID levels

Pool-VOLs whose RAID levels are different can be registered in the same pool.

However, in view of performance, HP recommends that you specify the same

RAID level for pool-VOLs registered in the same pool.

Drive type

All dri

ve types

Pool-V

OLs whose drivetypes aredifferent canberegisteredinthe same pool.

However, in view of performance, HP recommends that you specify the same

drive type for pool-VOLs registered in the same pool.

Volume capacity

8GBto2TB

Note:

Dividing a parity group into 16 volumes is recommended for best

performance.

LDEV format

When you change volumes that are used as normal volumes to pool-VOLs,

perform LDEV formatting before you register the volumes to a pool. Once you

Dele

ting pool-VOLs

You cannot delete pool-VOLs registered in pools. You need to delete pools

themselves, and then delete the pool-VOLs.

Path deﬁnition

Not available.

Avolume witha path deﬁnition cannot be speciﬁed as a pool-VOL.

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