HSD10 Operation
4-4 VAX 4000 Model 108 User Information
drives, and attached tape devices as TU81 tape drives. This identification is in device
name only, and does not reflect actual device geometries.
HSD10 Adapter Firmware
HSD10 firmware resides in a flash electrically Erasable Programmable Read-Only
Memory (EEPROM) device that can accept firmware upgrades via the modular jack
connector. See the StorageWorks Solutions HSD10 Array Controller User’s Guide, EK-
HSD10-UG, for upgrade procedure information.
Through an on-board firmware command utility, you can set device parameters including
node name, system ID, disk and tape allocation classes, and performance optimization
parameters. It also can be used for device formatting and qualification and to access device
information.
Overview of HSD10 Operating Requirements/Limitations
The HSD10 DSSI-to-SCSI bus adapter normally serves as a terminating end of the SCSI
bus. Its factory-default SCSI node address, or SCSI ID, is 7.
To remove the HSD10 controller, the enclosure and any affected DSSI bus nodes must be
powered off, i.e. they may not be warm-swapped. To remove disk drives, only the system
power must be turned off.
Depending upon the complexity of the configuration, total DSSI bus length should be
limited to 60 feet, with an HSD10 DSSI-to-SCSI bus adapter attached, to guarantee DSSI
bus integrity. A maximum length of 30 feet is permitted between individual nodes on the
DSSI bus.
The HSD10 DSSI-to-SCSI bus adapter does not support dual pathing or failover operation
for attached devices.
The HSD10 DSSI-to-SCSI bus adapter does not sequence disk drives when spinning up.
To minimize surge current to the power supply, spin up one or two drives at a time.
OpenVMS VAX Volume Shadowing
The HSD10 DSSI-to-SCSI bus adapter supports host-based volume shadowing, but does
not support HSD10-based shadowing assists. No HSD10 DSSI-to-SCSI bus adapter-based
Redundant Array of Independent Disks functionality is supported, except for RAID 0
(striping).
