Simple hardware troubleshooting on the Snap Server. (4046673)

Date: 04/07
Affected NV Version: 7.11 & 7.4.0
OS Version: All
Plugin version: N/A
Application version: N/A

Description: Simple hardware troubleshooting on the Snap Server.

1. How to identify the current devices attached to the snap server.
a. Run web browser and enter ip address of the Snap server
b. Login and select administration
c. From the menu select Monitor, SCSI
d. The GUI will display the scsi devices that the Snap OS can see
e. If no devices are listed then the OS isn't seeing the device and the appropriate hardware vendor should be contacted to troubleshoot the issue.
f. If devices are listed go to Step 2

2. How to check the current device(s) for functionality.
a. Open a putty session to the Snap Server
b. Login as admin and su
c. cd /
d. Using the information in the Snap Gui for the device(s) run mt -f devicename status
e. mt -f /dev/nst0 status
f. see proper output below

sh-2.04$ su
Password:
sh-2.04# cd /
sh-2.04# mt -f /dev/nst0 status
SCSI 2 tape drive:
File number=6, block number=0, partition=0.
Tape block size 0 bytes. Density code 0x0 (default).
Soft error count since last status=0
General status bits on (89010000):
EOF EOD ONLINE IM_REP_EN

Note the File number count (6) in the above example
Now do a rewind
sh-2.04# mt -f /dev/nst0 rewind
Now do a status, note the File number (0), did the rewind succeed?
sh-2.04# mt -f /dev/nst0 status
SCSI 2 tape drive:
File number=0, block number=0, partition=0.
Tape block size 0 bytes. Density code 0x0 (default).
Soft error count since last status=0
General status bits on (41010000):
BOT ONLINE IM_REP_EN

You can use any valid mt command such as rewind, EOD (end of Data) etc.

usage: mt [-v] [-h] [ -f device ] command [ count ]
commands: weof, wset, eof, fsf, fsfm, bsf, bsfm, fsr, bsr, fss, bss, rewind,
offline, rewoffl, retension, eod, seod, seek, tell, status,
erase, setblk, lock, unlock, load, compression, setdensity,
drvbuffer, stwrthreshold, stoptions, stsetoptions, stclearoptions,
defblksize, defdensity, defdrvbuffer, defcompression, densities,
datcompression, setpartition, mkpartition, partseek, asf.

**Caution** - "Do Not" use erase as this is a full erase and will take a considerable amount of time and once the command is issued you can't cancel it