Visit The New, Modern Unix Linux Community

Disk alignment inside of an LDOM

Thread Tools Search this Thread
Operating Systems Solaris Disk alignment inside of an LDOM
# 1  
Disk alignment inside of an LDOM

Hi! Quick background for the question...

I have Solaris 11.4 control/primary zone with some LDOM's on top of it. I have some raw iSCSI LUN's presented to the control zone/primary zone from a NetApp, which I then pass up to the LDOM's via the VDS/vdisk. So basically the LDOM VM's see the disk as a local disk. (VM's are all Solaris 11.4). Disks are presented from the NetApp as the "Solaris" OS type (current Oracle docs say to NOT use "Solaris EFI" OS type regardless of disk size or partition type).

There are some best practices and docs out there from both Oracle and NetApp that require you to add some configurations to the vds.conf file to make sure disks are aligned.

I am able to align (and verify they are aligned via NetApp and zdb command) any new zpool's that I make on the VM, but here is the question...

How can I align the root pool? The root pool is created when I install Solaris, so unlike creating a new zpool where it takes the block settings from the vds.conf file, the root pool wont have these settings.

As it stands now the zdb command is telling me there is an ashift of 9 (instead of 12) and the NetApp lun alignment is saying "partial-writes".

Last edited by rtmg; 04-03-2019 at 08:39 AM..
# 2  
Worked with Oracle on this. Its not possible on a root pool. They updated the Docs to say so.

If you follow best practices and use other LUN's/disks/NFS mounts for your "busy" apps, like Oracle DB, you can align those (if they come from NetApp's).

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #877
Difficulty: Medium
A real-time operating system (RTOS) is an operating system (OS) intended to serve real-time applications that process data as it comes in, typically without buffer delays.
True or False?

6 More Discussions You Might Find Interesting

1. Solaris

Sharing a physical disk with an LDOM

I have a guest LDOM running Solaris 10U11 on a Sun T4-1 host running Solaris 11.4. The host has a disk named bkpool that I'd like to share with the LDOM so both can read and write it. The host is hemlock, the guest is sol10. root@hemlock:~# zpool list NAME SIZE ALLOC FREE CAP DEDUP ... (3 Replies)
Discussion started by: Michele31416
3 Replies

2. Solaris

Exporting physical disk to ldom or ZFS volume

Generally, this is what we do:- On primary, export 2 LUNs (add-vdsdev). On primary, assign these disks to the ldom in question (add-vdisk). On ldom, created mirrored zpool from these two disks. On one server (which is older) we have:- On primary, create mirrored zpool from the two LUNs.... (4 Replies)
Discussion started by: psychocandy
4 Replies

3. Solaris

Disk expansion on LDOM Guest

Hi, There is LDOM Guest where I need to expand /u02 file systems on it. It is residing on a Solaris 11 Hypervisor (Primary Domain). The storage is expanded on vdisk presented to Hypervisor. I need steps to expand the /u02 on LDOM Guest. (2 Replies)
Discussion started by: vidya_sagar2003
2 Replies

4. Solaris

Installing Solaris OS on LDOM SAN Disk

I have viewed a few previous posts regarding this, but none of them quite described or worked with my issue. I am out of local disk space on my LDOM Manager but still have plenty of SAN vCPU and Memory available so I am trying to install a new LDOM OS on SAN. I have exposed the SAN to the... (0 Replies)
Discussion started by: MobileGSP
0 Replies

5. Shell Programming and Scripting


Hi, I am having a file with with format. however, for longer xml, the xml code has been truncated like this. F1 |###################### |String1 |<XML><REQ><MSGTYPE>DBDIRECT</MSGTYPE><SYNC>0</SYNC><CLIENT>C11</CLIENT>NAME=MYNAME|JOB=MYJOB| | ... (3 Replies)
Discussion started by: shellwell
3 Replies

6. UNIX for Dummies Questions & Answers

VI paste out of alignment

We have a guy at work who is trying to copy and paste from one file to another using vi and highlighting the code to copy with a mouse. Source file: xyz 123 abc 999 zyx 321 cba 999 xyz 123 abc 999 But when he pastes it he gets (I put the underlines in to show... (4 Replies)
Discussion started by: dlam
4 Replies

Featured Tech Videos