The output of ls -l /sys/block/*/device should give you an idea about how each device is connected to the system.
In the example below red is a virtual disk on an internal RAID controller, green is a CD-ROM connected via an IDE controller, and the rest are SAN-connected SCSI disks where "hostN" refers to the instance of the Host Bus Adapter they are connected to.
Hello everyone.
I was wondering if there is a way to increase the size on the LUN on a SAN and make the Linux kernel understand the changes without restarting?
In the past it has always been rebooted to see the new values but im sure that there is a way now for the lvm to see the Free PE in... (8 Replies)
Hi,
I'm new to SAN storage so I was wondering if someone can assist me with a problem. I have a solaris 10 OS with 3 SAN devices attached. We are trying to troubleshoot performance so I was asked to get the WWN of each SAN disk and show what it's attached to via the SVM mount in the metastat... (1 Reply)
Hi,
I have a SAN LUN of 550 GB created as an ext3 partition of the entire lun and need to make the lun and partition larger... 600 GB
# fdisk -l /dev/sdj
Disk /dev/sdj: 590.5 GB, 590558003200 bytes
255 heads, 63 sectors/track, 71797 cylinders
Units = cylinders of 16065 * 512 = 8225280... (3 Replies)
I am using hp ux 11.31
Our SAN storage is being presented from an IBM XIV.
We have 3 HP servers (rx4640's), and the XIV has them setup in a cluster, so that when a disk is presented all 3 servers can see the new LUN.
I'm setting up a new VM on one of the HP servers. I have allocated a 34Gb... (1 Reply)
Hello Everyone,
Can someone help me to mount a SAN hdisk which contains a clone data copy(san) of the remote server to the another machine. Both servers are running in AIX.
Thanks in advance !
Regards,
Gowtham.G (3 Replies)
Hi guys,
We have created a LUN on SAN and assigned it to a server.
On top of it we have created 4 LVM shares which are holding the data.
Is it possible to add this LUN to some other server and access the data on LVM shares?(noob here) (1 Reply)
hello,
i am an oracle DBA and trying to scan a newly created LUN of 200 GB on fiber channel by SAN admin.we have solaris 10 and SANtoolkit is installed.i tried following to get the new LUN at my machine. go /opt/Netapp/Santoolkit/bin and then ./sanlun lun show but i see only the existing... (12 Replies)
Hi All,
I am new for this blog and this is my first Query on this blog. I would like to dael with graet masters on linux.
Here we go,
After storage people created the LUN, How to add that LUN to Linux server. (Make that LUN visibility on linux server.) ?
How to view the LUN... (5 Replies)
Hello to all,
Actually, currently on my Solaris box, I've a LUN (5TB space) from a EMC storage which is working fine, and a partition with ZFS filesystem is created for that LUN. as further you'll see in the logs, the "c4t6006016053802E00E6A9196B6506E211d0s2" is the current configured LUN in the... (4 Replies)
Hello,
We have IBM storwize v7000 storage. I have created thin provisioned LUN and attached it to my server(dell r910, Centos 7).
Whenever I copy files in that LUN correspondingly Thin provisioned LUN's used space increases but when I remove files to free up space the LUN's size isn't... (5 Replies)
Discussion started by: Vit0_Corleone
5 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)