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Silicon Graphics systems, IRIX
This topic is available in English only.
contents of this section
determining the SCSI ID
configuring the device files
MTCAN and constants values
related topics
verifying installation
glossary
determining the SCSI id
Before you configure your system to support your new HP Surestore DLT1 drive,
you need to determine what SCSI ID to use. The SCSI ID must be unique for each
device attached to the SCSI bus. To list the existing devices, use the following
command:
% hinv -v | grep SCSI
This will produce output similar to the following:
Integral SCSI controller 0: Version WD33C93B, revision D
Disk drive: unit 1 in SCSI controller 0
In this, “unit X” indicates the SCSI ID. Review the list of existing SCSI IDs and
choose an available ID to assign to your new tape drive.
configuring the device files
To install the HP Surestore DLT1 drive on a Silicon Graphics system running IRIX,
you will need to modify the kernel configuration file.
If you want tar to default to short block transfers, change the 512*512 in
your tpsc or scsi HP entry to 128*512 (128-kilobyte blocks) or, better still,
64*512 (64-kilobyte blocks).
1
Select the name of the kernel configuration file for your version of IRIX from
the list below and open it with a text editor:
For IRIX 6.2 and later: /var/sysgen/master.d/scsi
2
Find the following entry in the kernel configuration file and copy it to a new
location in the file where you can edit it as appropriate for your tape drive:
For IRIX 6.2:
{DECDLT, TPDLT,8,4,"BNCHMARK","DLT1",0,0,{0},
MTCAN_BSF|MTCAN_BSR|MTCAN_APPEND|
MTCAN_PREV|MTCAN_SYNC|MTCAN_SPEOD|MTCAN_CHKRDY|MTCAN_VAR|
MTCAN_SETSZ|MTCAN_SILI|MTCAN_SEEK|MTCAN_COMPRESS,
/*minimum delay to I/O is 4 minutes, because when a retry
is *performed, the drive retries a number of times, and
then
*rewinds to BOT, repositions, and tries again.*/
40, 4*60, 20*60, 5*60, 512, 64*512, 0, (u_char*)0 },
For IRIX 6.4/6.5:
{ DATDLT, TPDLT, 8, 4, "BNCHMARK", "DLT1", 0, 0, {0},
MTCAN_BSF|MTCAN_BSR|MTCAN_APPEND|
MTCAN_PREV|MTCAN_SYNC|MTCAN_SPEOD|MTCAN_CHKRDY|MTCAN_VAR|
MTCAN_SETSZ|MTCAN_SILI|MTCAN_SEEK|MTCAN_COMPRESS,
/* minimum delay on i/o is 4 minutes, because when a
retry is
* performed, the drive retries a number of times, and
then
* rewinds to BOT, repositions, and tries again. */
40, 4*60, 4*60, 5*60, 3*3600, 512, 512*512,
tpsc_default_dens_count, tpsc_default_hwg_dens_names,
tpsc_default_alias_dens_names,
{0}, 0, 0, 0,
0, (u_char *)0 },
For an explanation of the functions of the MTCAN values and constants, see
"MTCAN and Constants Values".
3
Recompile the kernel by running autoconfig and then reboot the system.
When you reboot, the device files for the DLT1 drive will be created
automatically.
The following device files will be created in /dev/rmt:
tps0d3
tps0d3c
tps0d3cnr
tps0d3cnrns
tps0d3cnrnsv
tps0d3cnrs
tps0d3cnrsv
tps0d3cnrv
tps0d3cns
tps0d3cnsv
tps0d3cs
tps0d3csv
tps0d3cv
tps0d3nr
tps0d3nrns
tps0d3nrnsv
tps0d3nrs
tps0d3nrsv
tps0d3nrv
tps0d3ns
tps0d3nsv
tps0d3s
tps0d3sv
tps0d3v
tps0d3stat
These device file names can be interpreted as follows:
Device Name
Function
c
Compression
nr
No rewind on close
v
Device supports variable block sizes
ns
Device does not byte-swap
s
Device does byte-swap
stat Allows the device to be used when one of the other device
files specifying the same physical device is already opened
For example, the device file tps0d3 indicates a device on controller card 0 at
SCSI ID 3, and the device file tps0d3nrv indicates a device on controller card 0
at SCSI ID 3 that does not rewind on close and supports variable block sizes.
Once the device files have been created, you should confirm that your new tape
drive is working properly. See Verifying Installation.
MTCAN and constants values
The MTCAN values have the following functions:
MTCAN
value
Capability Enabled
APPEND Append to existing tape data
BSF Backspace file
BSR Backspace record
CHKRDY Determine if a tape cartridge is present
CHTYPEANY Change density and/or fixed to variable at points other than
beginning of tape
COMPRESS Compression
PREV Prevent media removal
SEEK Seek to a particular block
SETSZ Fixed block size can be set
SILI Suppress illegal length indicators
SPEOD Space to EOD (end of data)
SYNC Synchronous mode SCSI
VAR Variable block sizes
The constants have the following functions:
Constant
Description
40
Transfer time-out in "inverse ticks"
4*60
Minimum time-out in seconds for any command
4*60
Space command time-out in seconds
5*60
Time-out in seconds for long operations (such as rewinds)
512
Default block size in bytes for fixed block size mode
64*512 or
512*512
Recommended blocking factor in bytes for the upper limit of
read/write commands
© 2000, Hewlett-Packard Company
file:///C|/Documents%20and%20Settings/topher.COL-SPRINGS/Desktop/manual/document/dlt1/user/reseller/eng/c_silcon.htm [12/3/2001 7:50:53 AM]