sss - set spindle sync state of drives in an HP SCSI disk array
sss -d [drive_list] device_file
sss -on [-s] [drive_list] device_file
sss -off [drive_list] device_file
sss displays or changes the spindle synchronization state of the disk
drives in the HP SCSI disk array associated with device file
device_file. Though device_file is the name of a device file
corresponding to a LUN, sss operates (by default) on all disk drives
physically connected to the array controller, without regard to the
drives' LUN ownership. Even if multiple LUNs (or sub-LUNs) are
present, sss should be directed to only one of them (that is, specify
the name of the device file for only one of the LUNs in the sss
command line). To affect a subset of the physical drives in the
array, specify which drives to affect in drive_list.
-d Display only. Displays the current spindle
synchronization status. This has two components:
the drive's master or slave status and its state
of spindle synchronization (on or off).
-on Sync on. Enables spindle synchronization; one
drive is designated master and the rest are
designated slaves, unless the -s "slave only" tag
is present, in which case all designated drives
will be slaves. If only one drive is designated,
it will be a master.
-off Sync off. Disables spindle synchronization.
-s Slave only. Only used with the -on option. Make
all designated drives slaves. This is useful
when replacing a drive in a set of drives which
already have spindle synchronization enabled. If
you have replaced the master drive, use the -on
option without -s, and specify the new drive
drive_list A list of drives used to specify which drives in
the array will be affected by the synchronization
operation. drive_list is in the form cXiY ,
where X (a decimal number) represents the SCSI
channel number, and Y (a decimal number)
represents the SCSI-ID number of the desired
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drive. Drives names in drive_list are separated
by commas. If no drive_list is present, sss
defaults to all physical drives attached to the
array controller, regardless of which LUNs they
sss returns the following values:
0 Successful completion.
-1 Command failed (an error occurred).
DIAGNOSTICS AND ERRORS
Errors can originate from problems with:
+ SCSI (device level) communications
+ system calls
Error messages generated by sss:
usage: sss <<<<-d | -on [-s] | -off>>>> [cXiY,...] <<<<special>>>>
sss encountered an error in command syntax. Enter the command
again with the required arguments, in the order shown.
sss: Arg out of range
One of the arguments has exceeded its maximum or minimum size, or
is incorrect in form. Check the size and form of each argument.
sss: device busy
To ensure that sss does not modify a disk array that is being
used by another process, sss attempts to obtain exclusive access
to the disk array. If the disk array is already opened by
another process (for example, LVM - the Logical Volume Manager),
a ``device busy'' error message is returned by the driver. To
eliminate the ``device busy'' condition, determine what process
has the device open. In the case of LVM, it is necessary to
deactivate the volume group containing the array before
configuring the spindle sync state of the drives in the array
sss: LUN # too big
The LUN number, which is derived from the device file name, is
out of range.
sss: Not a raw file
sss must be able to open the device file for raw access.
sss: Not an HP SCSI disk array
The device being addressed is not an HP SCSI disk array.
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sss: Transfer length error
The amount of data actually sent to or received from the device
was not the expected amount.
SCSI (device level) communication errors:
Sense data associated with the failed operation is printed.
Error messages generated by system calls:
sss uses the following system calls:
malloc(), free(), stat(), open(), close(), read(), write(), and
Documentation for these HP-UX system calls contains information about
the specific error conditions associated with each call. sss does not
alter the value of errno. The interpretation of errno for printing
purposes is performed by the system utility strerror().
To display the spindle synchronization status of drives on HP SCSI
disk array /dev/rdsk/c22d0s2 on a Series 800:
sss -d /dev/rdsk/c22d0s2
To enable spindle synchronization on all drives of the HP SCSI disk
array /dev/rdsk/c410d3l3s0 on a Series 700:
sss -on /dev/rdsk/c410d3l3s0
The drive on SCSI channel 3 at SCSI ID 0 of the HP SCSI disk array
/dev/rdsk/c410d3l3s0 has just been replaced. The other drives in the
array are synchronized, and the replaced one was a slave. To enable
spindle synchronization on the new drive on a Series 700:
sss -on -s c3i0 /dev/rdsk/c410d3l3s0
If, in the replacement scenario above, the replaced drive was the
master, to enable spindle synchronization and make the new drive a
sss -on c3i0 /dev/rdsk/c410d3l3s0
or, alternatively, enable the whole set again:
sss -on /dev/rdsk/c410d3l3s0
This utility is currently supported only on HP C2425, HP C2427, and HP
C2430 disk arrays.
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sss was developed by HP.
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