Installation guide

• Refer to the vendor’s SCSI programming manual for information on
buffer ID’s and buffer modes supported.
The following notes apply to the download command:
• If you enter scu using the default device /dev/cam and then set the
device to download using the set nexus command, the code associated
with checking for mounted file systems will fail. This was done
purposely to prevent accidental downloading of disks with mounted file
systems.
• Some devices, such as many disks, require additional time after the
download operation to program the flash memory (save the firmware) to
recalibrate or perform other necessary setup before the device can be
accessed. In most cases, waiting 1 to 3 minutes is advised before
accessing the device. Most devices will not respond to a selection
immediately after a download operation.
• If a disk device determines that a recalibration is necessary, the drive
may be unavailable for up to 10 minutes. During this sequence, you can
usually issue the Test Unit Ready (tur) command to determine if the
calibration has completed. If the calibration sequence is interrupted, for
example by a bus reset, device reset, or by power cycling, the
recalibration will be restarted when the drive is powered up.
• Do not power cycle devices during the download operation. Doing so
may render your drive useless.
The following examples show the download command:
scu> download ???.fup save
Downloading & Saving Firmware File ’???.fup’ of 131076 bytes...
scu> download ???.fup save segment
Downloading File ’???.fup’ of 131076 bytes in 8192 byte
segments...
Download completed successfully, now saving the microcode...
scu> download ???.fup save segment 32k
Downloading File ’???.fup’ of 131076 bytes in 32768 byte
segments...
Download completed successfully, now saving the microcode...
format [density density-type][defects defect-list]
This command formats both hard and flexible disk media. Since this
command modifies the disk media, the full command name must be entered
to be recognized.
The
density-type parameter specifies the density type for flexible disk
media.
The
defect-list parameter can be all, primary,ornone. The default is
to format with all known defects. If you use the default device /dev/cam to
enter the scu utility and then use the set nexus command to set the
B–12 SCSI/CAM Utility Program