Compaq StorageWorks HSZ80 Configuration And Cli Reference Manual page 194

5–8 CLI Commands
Switches
NOTRANSPORTABLE (Default)
TRANSPORTABLE
Indicates whether a disk drive can be accessed exclusively by StorageWorks
controllers.
If the NOTRANSPORTABLE switch is specified, the controller makes a small
portion of the disk inaccessible to the host. This restricted space is used to store
information (metadata) used to improve data reliability, error detection, and the ability
to recover data. Because of this metadata, only StorageWorks controllers can retrieve
data from non-transportable devices.
Transportable disk drives do not contain any metadata or restricted areas. Therefore,
transportable disks forfeit the advantage metadata provides, but can be moved to a
non-StorageWorks environment with their data intact. Disks that are to be used in
storagesets cannot be set as transportable.
If you specify the NOTRANSPORTABLE switch and there is no metadata on the
unit, the unit must be initialized. If you specify TRANSPORTABLE for a disk that
was originally initialized as a NOTRANSPORTABLE, you should initialize the disk.
NOTE: Compaq recommends you avoid using transportable disks unless there is
no other way to move the data.
LOCAL (Default)
REMOTE
Specifies the disk characteristics in a mirrorset, either local or remote.
Disks set to REMOTE can only be added to mirrorsets and JBOD (that is, not
RAID5 raidsets).
Disks set to REMOTE can only be added to mirrorsets that are set to
DT_SUPPORT.
Disks set to LOCAL can be added to mirrorsets that are set to either
NODT_SUPPORT or DT_SUPPORT.
Disks set to REMOTE that are part of a mirrorset will not be the read source.