9 More Discussions You Might Find Interesting
1. HP-UX
Hi,
I am very new to HP-UX, and we're going to be doing a SAN migration.
We're going to take down the machine, and zone it to the new SAN.
My question is, will the device names change and will that interfere with the LVM?
If the new disks come in with different device names, how would I... (3 Replies)
Discussion started by: BG_JrAdmin
3 Replies
2. AIX
I'm having some trouble getting a POC of GPFS up and running. I've read a couple install guides including a couple IBM pdfs but I'm getting stumped on something I think is fairly fundamental.... I'm trying to do this all on a single 795, right now only the VIOs have HBAs so all LUNs are pointed to... (3 Replies)
Discussion started by: kneemoe
3 Replies
3. Solaris
Hi,
I have a query , is it possible that few LUNs presented to the Solaris OS which are in the unlabeled state can hung EVA frame and cause it to get unresponsive ?
please help.
thanks. (1 Reply)
Discussion started by: mushtaq
1 Replies
4. Red Hat
Hey everyone.
I am working on designing a logging solution for a deployment we have going out in a few months. Right now we have a single storage head end, connected via fibre to a SAN. Basically the plan is to create a number of smaller LUNs on the SAN, and then use LVM2 to handle concatenating... (5 Replies)
Discussion started by: msarro
5 Replies
5. UNIX for Advanced & Expert Users
Hi There,
Has anyone had any luck with or know how to get AIX 5+ to boot from a HP EVA 6000 SAN?
The servers used here will be P Class Blades
My initial searches on this so far did not bring results so I am guessing this may not be possible on HP SAN's but please let me know if I am... (0 Replies)
Discussion started by: fazzasx
0 Replies
6. AIX
I have a question about SAN commands
I have almost 15Tb of disk on my san
but assigned and something else I have almost 11Tb
There is a command to know, what its my real total storage capacity and
another command to know how much I used .?
Thanks again in advance (0 Replies)
Discussion started by: lo-lp-kl
0 Replies
7. Solaris
Hi everyone,
I wonder if I can canvas any opinions or thoughts (good or bad) on SAN attaching a SUN V880/490 to an EMC Clarion SAN?
At the moment the 880 is using 12 internal FC-AL disks as a db server and seems to be doing a pretty good job. It is not I/O, CPU or Memory constrained and the... (2 Replies)
Discussion started by: si_linux
2 Replies
8. HP-UX
I was conveniently excluded from some EVA8000 training, and now find myself with an EVA zoned, but no physical devices :(
My ioscan appears as follows:
ba 1 0/1 lba CLAIMED BUS_NEXUS Local PCI Bus Adapter (782)
fc 0 0/1/0/0 ... (3 Replies)
Discussion started by: mr_manny
3 Replies
9. Linux Benchmarks
CPU/Speed: PowerPC 603ev 200Mhz
Ram: 92M EDO Ram
Motherboard: Apple
Bus: 2 PCI
Cache: L1 32k and L2 256k
Controller: ATA
Disk: 2GB ATA
Load: 1 user, running httpd, Xwin, various daemons
Kernel: Linux 2.4.22-2f
Kernel ELF?: ???
pgms: gcc versión 3.2.2 20030217 (Yellow Dog Linux 3.0 3.2.2-2a);... (0 Replies)
Discussion started by: clemare
0 Replies
st_ats_enable(5) File Formats Manual st_ats_enable(5)
NAME
st_ats_enable - determine whether to reserve a tape device on open
VALUES
Default
Allowed values
Recommended values
DESCRIPTION
Note: this tunable was named in releases prior to HP-UX 11i v3.
This tunable notifies the stape or estape driver whether it needs to reserve a tape device on open and subsequently release it on close.
When this tunable is on, the stape or estape driver will attempt to reserve any tape device on open. The driver has a few tape devices
flagged as suitable devices for this functionality including: DLT 8000, DLT 7000, STK 9840, HP Ultrium, and others. DDS drives are not
flagged for this functionality.
The tunable allows the safe sharing of tape devices in multinode configurations like MC/ServiceGuard's Advanced Tape Sharing. The auto-
matic reserve and release protects the tape device from being accessed from multiple nodes, which would corrupt a backup. If the reserve
portion of the stape or estape driver's open routine fails, a status of is returned.
Who Is Expected to Change This Tunable?
Anyone.
Restrictions on Changing
Changes to this tunable take effect immediately and are used during the next open or close.
When Should the Tunable Be Turned On?
This tunable should be turned on if the system is going to be used in an MC/ServiceGuard's Advanced Tape Sharing configuration or the user
wants the stape or estape driver to use automatic reserve and release on open and close for multinode manageability.
What Are the Side Effects of Turning the Tunable On?
A reserve is sent to the tape device by the stape or estape driver on open and a release is sent on close. No other initiator or HBA will
be able to access the tape device while it is opened on another initiator or HBA.
When Should the Tunable Be Turned Off?
This tunable should be turned off for any SAN tape sharing solution configuration other than ATS. Most multinode backup applications (for
example, Omniback) manage device reservation themselves, and any interference by the stape or estape driver may produce problems. This
tunable should also be turned off for any multiplatform SAN configuration to keep tape access across platforms more uniform.
What Are the Side Effects of Turning the Tunable Off?
Unauthorized access from another initiator might interfere with any current tape operation.
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 HP.
SEE ALSO
scsi_tape(7), scsimgr_estape(7).
Tunable Kernel Parameters st_ats_enable(5)