Compaq HSZ80 manual Device Transfer Rate

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Transportable devices have these characteristics:

❏Can be interchanged with any SCSI interface that does not use the device metadata, for example, a PC.

❏Cannot have write-back caching enabled.

❏Cannot be members of a storageset or spareset.

❏Cannot be partitioned.

❏Do not support forced errors.

Consider these points when using the TRANSPORTABLE switch:

❏Before you move devices from the subsystem to a foreign subsystem, delete the units and storagesets associated with the device and set the device as trans- portable. Initialize the device to remove any metadata.

❏When you bring foreign devices into the subsystem with customer data, fol- low this procedure:

a.Add the disk as a transportable device. Do not initialize it.

b.Copy the data the device contains to another nontransportable unit.

c.Initialize the device again after resetting it as nontransportable. Initializing it

now places metadata on the device.

❏Storagesets cannot be made transportable. Specify NOTRANSPORTABLE for all disks used in RAIDsets, stripesets, and mirrorsets.

Device Transfer Rate

Specify a transfer rate that the controller uses to communicate with the device. Use one of these switches to limit the transfer rate to accommodate long cables between the controller and a device, such as a tape library. Use one of the following values:

■TRANSFER_RATE_REQUESTED=20MHZ (default)

■TRANSFER_RATE_REQUESTED=10MHZ

■TRANSFER_RATE_REQUESTED=5MHZ

■TRANSFER_RATE_REQUESTED=ASYNCHRONOUS

Compaq HSZ80 Array Controller ACS Version 8.3 Configuration and CLI Reference Guide