Visit Our UNIX and Linux User Community


p595 LPAR no longer sees SAN boot disk


 
Thread Tools Search this Thread
Operating Systems AIX p595 LPAR no longer sees SAN boot disk
# 1  
Old 11-07-2009
p595 LPAR no longer sees SAN boot disk

Hello, we have a wierd and urgent problem, with a few of our p595 LPARs running AIX 5.3. The LPARs ran AIX 5.3 TL 7 and booted off EMC SAN disks, using EMC Powerpath. Every boot we run "pprootdev on" and "pprootdev fix". We can issue "bosboot -a" and we can reboot the machines.

Now, on two occasions, right after the update to AIX 5.3 Technology Level 9, Service Pack 3 the system fails to reboot. When starting the partition to the SMS menu you can see the correct (rootvg) devices being scanned, but the devices are NOT listed as a possible boot device.

When booting off a NIM server and trying to restore an mksysb, the entire rootvg (all disks in it) is invisible and cannot be selected. Some user-defined volume groups are also "missing".

When giving the partition access to a 'new' EMC disk, this new disk shows up and can be used to restore the mksysb. When that is complete, the original disks show up properly (using lspv etc.) and seem perfectly alright.

Anyone ran into this same problem? Any idea's, suggestions, fixes??
# 2  
Old 11-07-2009
Quote:
Originally Posted by rwesterik
[..] When starting the partition to the SMS menu you can see the correct (rootvg) devices being scanned, but the devices are NOT listed as a possible boot device.

When booting off a NIM server and trying to restore an mksysb, the entire rootvg (all disks in it) is invisible and cannot be selected. Some user-defined volume groups are also "missing".[...]
Being able to see a device but being unable to access the data area sounds like a SCSI disk reservation problem.
# 3  
Old 11-11-2009
Problem was EMC related.

Thanks for your suggestion. It indeed was a SCSI reservation type of problem. Related to a nondisruptive EMC code upgrade. EMC is looking into it.

Previous Thread | Next Thread
Test Your Knowledge in Computers #304
Difficulty: Easy
sed is a stream editor and is used to perform basic text transformations on an input stream (a file or input from a pipeline).
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

AIX - SAN Mount and Unmount on LPAR

We have 2 LPAR. LPAR #1 have a Application, Database Server process (ctree Server) and SAN+Physical Table. LPAR#2 has only Application. Both Application process are connected to Database via C-tree Server Process (Running on LPAR #1.. We want to keep one Active C-tree Server and one Backup... (1 Reply)
Discussion started by: gabhanes
1 Replies

2. AIX

AIX LPAR FC connection to SAN

Hi all, In my system, I have HMC 7 with Power Machine 6 & 7. On the managed system, we have many lpars. In some lpars, I can see they are using virtual fiber channel to connect to DS8K storage. In search with google, I understand that it is configured with VIOS server to share the physical FC... (7 Replies)
Discussion started by: Phat
7 Replies

3. AIX

LPAR cannot added disk

Dear All, I created a new partition through "Integrated Virtualization Manager" but there have an error when I added a new disk to the partition. The disk already created without any issue, Below error is to add the disk to the partition An error occured while modifying the assignments... (5 Replies)
Discussion started by: lckdanny
5 Replies

4. AIX

Adding disk to my lpar

hi all i have entered Aix environment 4 months had experienced in linux what i am facing is i am unable to do sort of RnD with aix like installation on my own, creating vgs managing networks, the VIOS, storage,lpars, So we have a setup here almost all are in live production environment with... (4 Replies)
Discussion started by: vax
4 Replies

5. AIX

VIO and LPAR disk/fcs communications

:wall::wall::wall: 1. I have created an LPAR in the HMC. 2. I have allocated the storage from an Hitachi AMS2500 and assigned it to the host group. 3. I have zoned the LPAR and Storage on a Brocade 5100. (The zone sees the AMS) Next I activated the LPAR in the HMC, SMS mode for the mksysb... (3 Replies)
Discussion started by: Dallasguy7
3 Replies

6. Solaris

Identify Boot from SAN

How to identify the server is BOOT FROM SAN. Also how one can find from which device it is booted? Thanks Rahul Double post, continued here (0 Replies)
Discussion started by: rahul.kurumkar
0 Replies

7. AIX

VIO Backing Disk LPAR how to find which one ?

hello Folks, my vio: $ lsmap -all SVSA Physloc Client Partition ID --------------- -------------------------------------------- ------------------ vhost0 U9117.MMA.6534BE4-V2-C11 0x00000003 VTD ... (0 Replies)
Discussion started by: filosophizer
0 Replies

8. AIX

VIO SAN STORAGE LPAR ( Dynamically increasing size )

Hi, Is there a way to dynamically increase the size of virtual disk on the LPAR. The virtual disk is coming from my VIO Server. From my SAN I have allocated a disk to VIO Server and from VIO Server to my LPAR....If I increase the space of the logical SAN DISK (DS 4700 using IBM TotalStorage... (0 Replies)
Discussion started by: filosophizer
0 Replies

9. Solaris

Solaris in a SAN BOOT

My current situation is like this, I have a v440 connected to a netapp central storage 3140 via fiber channel, my OS and oracle is installed in the internal drive of the v440. What I would like to do is to advertise another LUN in netapp to the v440 and let my v440 boot from it so I can start... (3 Replies)
Discussion started by: q8devilish
3 Replies

10. AIX

LPAR and vio disk mapping

We have a frame the uses 2 vios that assign disk storage to LPAR's. We have a LPAr with multiple disk and I want to know how do I tell which vio is serving the disk. For example the LPAr has hdisk 0, 1, 2, 3 all the same size. I want to know which vio is serving hdisk0, 1. (4 Replies)
Discussion started by: daveisme
4 Replies

Featured Tech Videos