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Selected system administrator activities Cleaning physical drives
PLM Refresh Interval
Number of days after which the physical volumes in this group are to be recopied. The
count starts with the day on which the physical volume switched from scratch status to
write status. This value must be defined in accordance with the recommendations of the
tape manufacturer.
Default: 365
4.5 Cleaning physical drives
The cleaning of physical drives can be carried out by the robots, or by CentricStor
(see section “Physical Volume Operations » Add Physical Volumes” on page 223).
Generally speaking, physical drives are cleaned automatically by the robots which means
that it is only necessary to check the cleaning tapes regularly.
However, the following robots are the exception to this rule:
● SCALAR 1000 with a direct SCSI connection (not via DAS/ACI or SDLC) with
MAGSTAR drives
Since SCALAR 1000 has no special interface to the MAGSTAR drives that allow it to
see a clean request from the MAGSTAR drives, the system administrator must regularly
check the operating panel of the MAGSTAR drives.
MAGSTAR drives indicate a clean request by issuing a *CLEAN message to their
operating panel. And then the system administrator must trigger the cleaning process
by hand from the SCALAR 1000 operating panel.
● SCALAR 100
SCALAR 100 also does not have an automatic cleaning feature. The drives indicate a
clean request via a special clean symbol (stylized broom) on the drive field of the
SCALAR 100 operating panel.
In this case, the system administrator must also trigger the cleaning process by hand
from the SCALAR 100 operating panel.
If the robots you are using do not offer an automatic cleaning function, CentricStor can also
take on the cleaning of physical drives.
Cleaning by CentricStor is carried out if the cleaning PVG that is automatically
created for each tape library provides cleaning tapes (see section “Physical Volume
Operations » Add Physical Volumes” on page 223 and section “Physical Compo-
nents” on page 254).
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