HP StorageWorks XP Remote Web Console Software - Manual (Page 23)

Table 9 Operating System and File System Capacity
Pool Capacity Consumed Metadata Writing File System Operating
System
Size of V-VOL. Writes metadata in 8 MB intervals. JFS AIX
If you change the Allocation Group
Size settings when you create the
file system, the metadata can be
written to a maximum of 64 MB.
Approximately 65% of the pool is
used.
Small (one page). Writes metadata to first block. JFS2
Small (one page). Writes metadata to first block. VxFS
Small (one page). Writes metadata to first block. JFS (VxFs) HP-UX
Size of V-VOL. Writes metadata in 10 MB
intervals. HFS
Depends on allocation group size.
The amount of pool space Writes metadata in Allocation
Group Size intervals. XFS Linux
consumed is approximately [V-VOL
Size]*[42 MB/Allocation Group
Size].
About 33 % of the size of the
V-VOL. Writes metadata in 128 MB
intervals. Ext2
Ext3
The default block size for these file
systems is 4 KB. This results in 33%
of the V-VOL acquiring pool pages.
If the file system block size is
changed to 2 KB or less, the V-VOL
Page consumption becomes 100%.
Size of V-VOL. Writes metadata in 52 MB
intervals. UFS Solaris
Small (one page). Writes metadata to first block. VxFS
Small (one page). Writes metadata to first block. NTFS Windows
Server 2003
The allocated capacity increases if
the update of the file is repeated,
and the effectiveness of reducing
the pool capacity consumption
decreases.
Small (one page). Writes metadata to first block. NTFS Windows
Server 2008
If you perform the standard format
operation when creating the file
system, the size of the pool
capacity as same as the file system
capacity is consumed. In this case,
we recommend the quick format.
The allocated capacity increases if
the update of the file is repeated,
and the effectiveness of reducing
the pool capacity consumption
decreases.
Small (one page). Writes metadata to first block. VFS Tru64
Small (one page). Writes metadata to first block. AdvFS
Small (one page). Writes metadata to first block. VMS OpenVMS
Preparing the Storage System and Remote Web Console Computers 23