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When bringing non-HS1CP devices to an HS1CP subsystem, initialize the
device after setting it transportable, then copy the data on the device to
another, nontransportable, unit. Then, reinitialize the device after setting
it nontransportable (thereby putting metadata on the device). You must
initialize these devices because they can contain intact metadata blocks,
which can ‘‘fool’’ the controller into attempting to run with the device.
CAUTION
Do not keep any device set as transportable on an HS1CP controller
subsystem. Doing so sacrifices forced error support on all units attached
to the device. This is mandatory for HBVS and improving data integrity
on the entire array.
A transportable device is interchangeable with any SCSI interface that does
not utilize the device metadata (for example, a VAX workstation, an SZ200, or
a PC). Transportable devices are not MSCP compliant, cannot have write-back
caching enabled, cannot be members of a shadowset or storageset, and do not
support forced error. An HS1CP error (see Chapter 6) occurs if the operating
system attempts to write forced error information to a transportable device.
Transportable/nontransportable device support is summarized in Table 5–6.
Table 5–6 Transportable and Nontransportable Devices
Media Format
VAX or Alpha
Workstation
HSC K.scsi
HSD05
HS1CP
Transportable
Yes
No
Yes
Yes
Nontransportable
No
Yes
No
Yes
5.15 Moving Devices Under the Same HS1CP
CAUTION
Do not use a controller failure situation as an opportunity to move devices
or otherwise reconfigure your subsystem. Doing so prevents the controller
from communicating with its units once the fault is corrected.
You can physically relocate some or all of a storageset’s member devices according
to the following procedure. (This procedure also applies to reduced RAIDsets, but
you must remember to add the RAIDset as REDUCED when you recreate it.)
CAUTION
Label any devices before you remove them. If you lose track of the
storageset members at any point during this procedure, you must attempt
to restore the storageset by guessing where its members are installed.
There is currently no way to retrace your steps using the controller or
HS1CP operating firmware.
1. Make note of all devices comprising the storageset. Digital recommends
marking them after using the LOCATE command to find all storageset
5–30 Normal Operations