07-17-2008
Don't use SAN disk to create your paging space,if SAN disk error happen,or switch,or other device.all of device problem about SAN environment can cause your AIX hang.if you lost normal OS,you can't find root cause about problem.
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1. AIX
Hi friends..
My one problem is not resolved yet I have another.
I am planning to take an OS backup of my p550 using "mksysb". Now i am confussed. suppose I give the command to take the backup into a tape drive and my backup size exceeds the tape capacity.. what will happen? will it ask for... (2 Replies)
Discussion started by: balaji_prk
2 Replies
2. AIX
Am taking a tape backup and the error output shows this.
----------------------------------------------------------------
====== mksysb errors from /opt/uss/log/run_mksysb.stdout:
0512-038 mksysb: Backup Completed Successfully.
====== mksysb errors from /opt/uss/log/run_mksysb.stderr:
... (1 Reply)
Discussion started by: balaji_prk
1 Replies
3. AIX
I dont have either a tape drive or a DVD Writer attached to the AIX box. Can you let me know the possibilities of making an mksysb in a bootable media? This is required as we have a requirement to upgrade the OS. (2 Replies)
Discussion started by: chrisanto_2000
2 Replies
4. AIX
Hi, guys
I have experience in UNIX, but more in hpux, have done an mksysb in an Aix server 5.3, and then restore in other server with same model, everithing fine but no TCP/IP configuration and hostname its like "localhost" after the restore. It's something wrong? I've change the configuration,... (5 Replies)
Discussion started by: uadm26
5 Replies
5. AIX
hi guys,
i just want to take my server's mksysb backup through dvd-rom.but am having the doubt that, while am taking the mksysb backup in image it shows 8GB. So can i confirm that it takes 2 dvds and after writing in 1st cd it will ask for 2nd cd??????
please help me out. (1 Reply)
Discussion started by: rrlog
1 Replies
6. AIX
Hello,
I'm starting a mksysb with the help of a unix script and the crontab.
The script is scheduled with crontab and executes "mksysb -i -X /dev/rmt0".
When the mksysb is completed the script displays the endtime.
But I also get a lot of cat messages (see below). When I look with "ps -ef... (2 Replies)
Discussion started by: Peter_e
2 Replies
7. AIX
Hi All,
Working on AIX 4.2 system. On this server there is no tape drive or a DVD Writer attached to the AIX box.
I was able to do mksysb, but I got warning message saying it will not be bootable.
On the new system, I did install 5.3 and now I need to restore this mksysb image from the... (5 Replies)
Discussion started by: samnyc
5 Replies
8. AIX
Hi,
Can any one suggest me how to take the mksysb backup in CD (VCD/DVD). I have tried like #mkcd -d /dev/cd0, but its not working. (3 Replies)
Discussion started by: oprakash
3 Replies
9. AIX
hi
we are having one rootvg in that we created one lv named mksysb_backuplv
and normally script will run accordingly to take the backup in the cron,here i just want to know if any rootfilesystem was correpted like /usr or /tmp ,then how could i restore the particular filesystme from the... (1 Reply)
Discussion started by: senmak
1 Replies
10. AIX
Hello,
I use commands savevg & mksysb to do backups on an AIX server.
Frequently, I have a return code 3.
I would know why, but after searches, I did'nt find.
If somebody know ... Tell me.
Thanks.
emetra (2 Replies)
Discussion started by: emetra
2 Replies
LEARN ABOUT HPUX
norewind_close_disabled
norewind_close_disabled(5) File Formats Manual norewind_close_disabled(5)
NAME
norewind_close_disabled - determine whether access to tape device special files without the no-rewind-on-close option is allowed
VALUES
Default
Allowed values
DESCRIPTION
Note: this tunable was named in releases prior to HP-UX 11i v3.
This tunable notifies the tape driver whether it should allow access to device special files without the no-rewind-on-close option. When
this tunable is on, the tape driver will fail any open on a tape device special file that does not have the no-rewind-on-close option (that
is, or with a status of
The tunable allows the safe sharing of tape devices in SAN tape backup solution configurations. The disabling of device special files
without no-rewind-on-close in a SAN tape backup solution configuration prevents the accidental sending of a rewind command on close from
HP-UX systems via standard tape commands like which would corrupt a backup in process.
Who Is Expected to Change This Tunable?
Anyone.
Restrictions on Changing
Changes to this tunable take effect immediately.
When Should the Tunable Be Turned On?
This tunable should be turned on if the system is going to be used in a SAN tape backup solution configuration.
What Are the Side Effects of Turning the Tunable On?
The tape driver will fail any open to a tape device special file that does not have the no-rewind-on-close option with a status of This
behavior prevents the usage of any tape device special file without the no-rewind-on-close option.
When Should the Tunable Be Turned Off?
This tunable should be turned off if the system is not part of a SAN tape backup solution configuration or the system utilizes will not
function unless it has access to device special files without the no-rewind-on-close option.
What Are the Side Effects of Turning the Tunable Off?
A rewind may be issued accidentally from this system on close, possibly corrupting a backup being issued from another system on the SAN.
What Other Tunables Should Be Changed at the Same Time?
None.
EXAMPLES
Query the current value of the tunable:
Set the value of the tunable to
To save the value of the tunable across reboots:
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of
HP-UX.
Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation,
some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tun-
able values, consult the documentation for the kernel software being installed. For information about optional kernel software that was
factory installed on your system, see at
AUTHOR
was developed by Hewlett-Packard.
SEE ALSO
scsi_tape(7), scsimgr_estape(7).
Tunable Kernel Parameters norewind_close_disabled(5)