Guidelines - HP BACKCOPY Reference Manual

Guidelines

The file-mode options that are meaningful with the EMULATEFSF option is LISTONLY.
This is to fasten the LISTONLY and PARTIAL in some specific types of physical tape drives such
as M8501 and M8502 models of LTO-3 tape drives.
You cannot use the EMULATEFSF option with the VOLUMEMODE restore option.
The usage of EMULATEFSF is meant for M8501 and M8502 Tape drives. Virtual and other
physical tape drives does not show any performance improvement for restore operations, or
is slower with this option.
It is recommended to use EMULATE FSF option in a NON-CLIM setup because CLIM based
setup might slow down the performance.
The option is known to work best with small files < 3-MB file size , in reasonably small sized
backup image. However, with a very large average file size of 30-MB and huge total backup
size > 19-GB, EMULATEFSF might have negative performance impact.
Examples
This example is a listing created to verify the contents of the tape:
1> RESTORE $TAPE, *.*.*, LISTONLY, EMULATEFSF, NOUNLOAD
EXT
The EXT option specifies new extent sizes for restored files. It is used only to convert Enscribe files
from the DP1 to DP2 format.
EXT { extent-size
{ ( pri-extent-size, sec-extent-size
NOTE: The use of extent sizes over 65535 requires format 2.
You can specify these values for extent-size, pri-extent-size (primary extent size), and
sec-extent-size (secondary extent size):
0:512,000,000 [ PAGE[S] ]
specifies the extent size in pages (2048-byte units). The minimum extent size is one page, so
specifying 0 pages allocates one page (2048 bytes). PAGE is the default unit of measurement
for the EXT option.
0:2,147,483,647 BYTE[S]
specifies the extent size in bytes. RESTORE rounds up to the next full page. For example, if you
specify 2047 bytes, RESTORE allocates one page; for 2049, it allocates two pages, and so
on.
0:2,147,483,647 REC[S]
specifies the extent size based on the current settings for record length, data-block length,
index-block length, key-field lengths, and compression settings. RESTORE rounds up to the next
full page.
Guidelines
You cannot include the EXT option if your RESTORE command also contains either the PARTOF
or PARTONLY ON option.
Key-sequenced files sometimes become larger during conversion. To avoid file-system error
45 (file is full), use the EXT option to increase the destination file size.
134 RESTORE
}
}