10-10-2018
I have no experience with boot from SAN on metal, to put a small disclaimer upfront.
Not related to the problem...what would really help you is to have a separated installed operating system on both environments (DCs), with data part replicated in separate volume groups.
That way, only thing you do is import the volume group and (possibly or not depends) an ip assignment, depending on the topology and services such as vrrp or higher layer used.
I never endorsed SAN boot on metal personally (but in vms of course), always had couple of local disks to mirror ...
Point being, i would go with service separation and clean install on each of the sites, while cloning data part via storage methods.
Hopefully someone else who used linux SAN boot will be of more assistance with the actual problem.
Regards
Peasant.
This User Gave Thanks to Peasant For This Post:
10 More Discussions You Might Find Interesting
1. Solaris
I have solaris 10 sparc. I installed a Qlogic hba card.
This card is connected on a brocade switch and the brocade is connected on 2 different controllers on a Hitachi disk bay.
I formated 2 luns. On my solaris system, i have 4 disk.
How to configure solaris 10 to fix the dual disk view.
... (4 Replies)
Discussion started by: simquest
4 Replies
2. Solaris
Hi,
I saw your post on the forums about how to setup IP multipathing. I wanted your help on the below situation .
I have 2 servers A and B . Now they should be connected to 2 network switches . S1 and S2.
Now is it possible to have IP Multipathing on each of the servers as follows ?
... (0 Replies)
Discussion started by: maadhuu
0 Replies
3. Solaris
Hai
we using emc storage which is conneted to M5000 through san switch.
we asign 13 luns but in server it is showing 22 luns.
i enable the solaris multipathing (MPxIO)
#more /kernel/drv/fp.conf in that file
MPxio-disable=no
#mpathadm list lu
it shows ... (2 Replies)
Discussion started by: joshmani
2 Replies
4. Solaris
Hello,
I turned on the server multipathing:
# uname -a
SunOS caiman 5.10 Generic_141444-09 sun4v sparc SUNW,T5140
stmsboot -D fp -e
And after a reboot the server, multipathing is not enable:
# stmsboot -L
stmsboot: MPxIO is not enabled
stmsboot: MPxIO disabled
# ls /dev/dsk... (4 Replies)
Discussion started by: bieszczaders
4 Replies
5. UNIX for Dummies Questions & Answers
Hello,
I'm trying to put puppy linux 4.2.1 (I can't use the latest because it won't boot on my hardware) on a grub2'd usb drive.
It throws the error that it can't find pup_421.sfs
Here is my /boot/grub/grub.cfg
menuentry "Puppy 4.2.1" {
loopback loop... (2 Replies)
Discussion started by: Narnie
2 Replies
6. Debian
Hello, firstly excuse for my poor english.
I have a busybox error when I try to run Debian 6. It's like Grub cannot find root (initramfs)
My system is:
- RAID0 with dmraid
- /boot ext2 (from moonOS installation --ubuntu based--)
- ext4 (moonOS wich have the Grub2 installation, where I... (0 Replies)
Discussion started by: neutralTTY
0 Replies
7. Linux
I got a dual boot with grub2, but everytime I turn on the computer and the booter is loaded, I can't handle the menu, so I am forced to wait the countdown and choose the default option.
I'd really like to know why!
This is my grub.cfg,
# # DO NOT EDIT THIS FILE # # It is automatically... (0 Replies)
Discussion started by: Luke Bonham
0 Replies
8. Red Hat
Hello
This is happening on: 3.13.7-200.fc20.x86_64
This happened already some weeks ago, until now i didn install linunx onto this machine, as i had to turn in the laptop to the service center so they could fix the UEFI flash storage.
Either way, its happening again. as i installed Fedora 20... (1 Reply)
Discussion started by: sea
1 Replies
9. Red Hat
I have a couple of questions regarding multipath.
If I do vgdisplay vg01, I see it is using 1 PV: /dev/dm-13
If I type multipath -ll I see dm-9, dm-10, dm-11, dm-12, but do not see dm-13. Is my vg01 multipathed? How can I actually know for sure?
Secondly, let's say this time vg01 says... (1 Reply)
Discussion started by: keelba
1 Replies
10. UNIX for Beginners Questions & Answers
I have centos 7 gui installed on vmware workstation12 on my laptop.WhenI want to pause my splash screen while starting my centos 7 using the 'esc key' nothing happens and the system just boots up.I also see a entry for aci_memory_fail... entry during the boot process.help me fix the system. (1 Reply)
Discussion started by: sabsac
1 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)