System information

HSD10 Operation
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VAX 4000 Model 108 User Information
they are not identical to an RF72 in capacity or geometry; therefore, disk drives attached
to HSD10 adapters can only be shadowed with identical SCSI drive types. They may not
be shadowed with true RF72 disk drives or with any other DSSI disk drive types. For
example, if the first member of a HSD10-configured shadow set is an RZ28 disk drive, all
other members of the shadow set also must be RZ28 disk drives.
Shadow sets may be composed of drives on different HSD05/HSD10 adapters, on the same
or different DSSI buses, as long as they are part of the same system or cluster. However,
drives attached to an HSD10 adapter cannot be shadowed with drives attached to a non-
HSD05/HSD10 controller. For example, a drive configured on a local SCSI adapter or on
an HSC/HSJ-family controller may not be shadowed with a drive on an HSD10 adapter,
even if it's an identical drive type.
Using Tape Drives
The HSD10 adapter uses two possible tape device type identification names when
communicating with the host. All attached tape drives are by default identified as HST00;
alternatively they may be identified as TU81[TM]. The device type reported to the host
does not affect actual accessible tape storage space.
For tape devices that support multiple densities, density selection is made using the
/DENSITY modifier in DCL INIT and MOUNT commands. To select the noncompacted
density, use /DENSITY=1600; to select the compacted density, use /DENSITY=6250. The
selected density will be shown in a SHOW DEVICE display. The
MEDIA_FORMAT=COMPACTION qualifier for the DCL INIT and MOUNT commands
is not used for HSD10-served drives.
Note that the HSD10 adapter always operates cache-capable tape devices in cached mode,
regardless of the setting of the MOUNT/CACHE=TAPE command.
HSD10 Firmware Upgrade (Flash Boot) Utility
The HSD10 adapter is equipped with the ability to accept firmware upgrades via the serial
communications port on the HSD10 module. This Flash Boot Utility executes upon power-
up and HSD10 restarts. When invoked, it permits firmware downloading and modification
of the serial port baud rate.
Basic instructions for performing an upgrade are presented below; however, upgrades are
typically done by Digital service personnel. Upgrading the HSD10 should not be attempted
by the user except under direction by a service representative.