Hi,
How do I mirror an external scsi vg to one hdisk san? The vg has multiple hdisks and the san hdisk has only one.
Is this possible or do I need to create the same hdisks as the scsi? What I meant is, if the scsi vg has 10 hdisk then I need to create also 10 hdisk of san with the same... (6 Replies)
To summarize the problem: The "IBM FastT Storage Manager Client v8" shows that our Disk Farm is arranged into 6 logical drives each in a RAID 5 configuration. This software also shows that 5 of the 6 logical drives (from Disk Farm) are in a error state: "Failed Logical Drive - Drive Failure".... (1 Reply)
Hello,
I have AIX 6.1 with TL 4 and it is connected to IBM SAN STORAGE DS4700
After assigning some disks from SAN to AIX, I can see the disks in my AIX as
hdisk2 Available 05-00-02 MPIO Other DS4K Array Disk
hdisk3 Available 05-00-02 MPIO Other DS4K Array Disk
But it should... (0 Replies)
HI all,
I had recently change the Server storage from EMC to the IBM SAN.
but after the configuration, the IBM success to see the server HBA port and successfully assign a LUN for the server.
When i go to the server, and restarted it. i use the "format" command to check, but din see any... (1 Reply)
hi guys
I installed Centos 5.5 (local disk). I am using 2 HBAs
Now I mapped 5 LUNs from a Storage.
I will be using LVM
just to test I assigned a LUN I've read I have to use multipath to avoid my Centos see the LUN twice
I enabled mdmpd and multipathd...
something else I should do?
... (8 Replies)
Hello,
I have IBM SAN STORAGE DS4100 and one of the cache battery for the controller is dead. Suddenly the performance has been degraded and access to SAN disks ( reading and writing ) became very slow ?
My query: Replacing the battery will take 6 days, so in the mean time what are the ways... (1 Reply)
Hello,
I have DS4000 IBM SAN Storage ( aka FastT Storage )
One of my disks has failed and I had a hot spare disk covering all the arrays. As the disk failed, immediately the hotspare disk took over the failed disk ( see the JPEG in the attachment )
My Question: How can I make the hotspare... (1 Reply)
Has anyone tried SAN to SAN mirroring on IBM DS SAN Storage.
DS5020 mentions Enhanced Remote Mirror to multi-LUN applications
I wonder if Oracle High availibility can be setup using Remote Mirror option of SAN ? (1 Reply)
Hi,
This is follow up to the post https://www.unix.com/aix/233361-san-disk-appearing-double-aix.html
When I connected Pseries Machine HBA Card ( Dual Port ) directly to the SAN Storage DS4300 , I was able to see Host Port Adapter WWN numbers , although I was getting this message... (2 Replies)
Discussion started by: filosophizer
2 Replies
LEARN ABOUT HPUX
st_san_safe
st_san_safe(5) OBSOLETED st_san_safe(5)NAME
st_san_safe - determine whether access to tape device special files without the no-rewind-on-close option is allowed (OBSOLETED)
VALUES
Failsafe
Default
Allowed values
Recommended values
or
DESCRIPTION
Note: this tunable is obsoleted and has been renamed to beginning with release 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 without 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 from this system accidentally 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.
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 norewind_close_disabled(5), scsi_tape(7), scsimgr_estape(7).
Tunable Kernel Parameters st_san_safe(5)