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Operating Systems Solaris Can I create virtual disk from zpool on Solaris 11.4 for OVM? Post 303045090 by solaris_1977 on Wednesday 11th of March 2020 07:14:44 PM
Old 03-11-2020
Can I create virtual disk from zpool on Solaris 11.4 for OVM?

Hello,

I am here again, with another issue.

I am setting up a new Oracle VM setup (GUI). On the backend, it is ldom concept, but GUI seems to have an easier interface.
For now, we don't have any SFP module and these two S7 Sparc servers are not connected to Storage, so I have to live with local disks only. Now the limitation comes here.
I will create one repository with one local disk and can create VM's from that. That means, VM will be sitting on that repository, which is made of local disk. If ever, I want to replace that local disk (due to hard/transport/bad errors), I will not be able to migrate these VMs to another repository/pool because these VMs are on local disk. This will be a bad design.
Even if I create zpool with two disk, I thought I should be able to see that pool in OVM. But from Oracle VM perspective GUI Manager does not recognize zpools, only disk. I created a case with Oracle for best practice to be used for this and they responded -- "OVM is not designed to manage redundancy with local disks. That is why Oracle VM is capable to handle SAN Storage over the network or even fiber channel. Now from Solaris perspective, I think that you can manually assign zpool as virtual disk to the LDOMs guest, but you need to do research on this if this is possible"

I tried to google and didn't find any relevant note, if I can create virtual disks from zpool.

Another idea came in my mind was, if I can create hardware RAID, then OS will see that single disk, but then I found this link - Hardware RAID Support -
SPARC and Netra SPARC S7-2 Series Servers Administration Guide
and it denies it.

Any suggestions or ideas, please ?

Thanks
 

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voldiskadd(8)						      System Manager's Manual						     voldiskadd(8)

NAME
voldiskadd - Adds one or more disks for use with the Logical Storage Manager SYNOPSIS
/usr/sbin/voldiskadd disk-address-list DESCRIPTION
The voldiskadd utility sets up new disks that are added to the system after the initial system installation and configures the disks for use by the Logical Storage Manager. A valid disk label must exist on the disk before using the voldiskadd utility. One or more disks may be specified using a disk-address-list. Disk addresses in the list have the form dskn (for the entire disk) or dsknp (for a specific partition). When specifying multiple disks, use a space between entries. Disk address names relate directly to device names in the /dev/disk directory. For example, here are some valid voldiskadd disk-address-list specifications: # voldiskadd dsk1 # voldiskadd dsk2 dsk3a The file, /etc/vol/disks.exclude, may be used to exclude disks from use by voldiskadd. Each line of the file specifies the name of a disk to exclude (for example, dsk5). The voldiskadd utility prompts the user for a disk group name and disk media name for the disks. If a new disk group name is specified, that disk group is created for the new disks. If no disk group name is specified, the disks are left as unassigned replacement disks for future use. If an existing disk group name is specified, the user is prompted for whether the disks should be designated as spares for the disk group. If a disk is found to already contain non-Logical Storage Manager partitioning, the user is asked whether the disk should be encapsulated. Encapsulation turns each partition of the disk into a volume. A disk should be encapsulated if it contains file systems or data that should not be overwritten. If encapsulation is not desired for a disk, the disk can be initialized as a new disk for use by the Logical Storage Manager. For new disks, all space on the disk becomes free space in the disk's disk group. Context-sensitive help is available at every prompt by typing ?. Also, a list option can be used to get information on available target disks for an operation. The voldiskadd utility supports the following general classes of actions: Initializing a disk with reserved regions and partitions. Disk initialization is performed by calling voldisksetup command. Adding a disk to an existing disk group. This operation can be performed independently of the initialization of the disk drive to add a disk's storage space to a disk group's free space pool. The volassist command may subsequently allocate from that free space. The disk can also be added as a hot spare device. Creating new disk groups in which to import new disks. If no disk group exists for importing disks, the option of creating the disk group is offered. Encapsulating disks that have exist- ing contents. This is the default action for disks that do not have a valid, existing Logical Storage Manager private region, but that do have a disk label. Encapsulation is performed by calling volencap. Reconnecting a drive that was temporarily inaccessible. This situation is detected automatically, by noting that the specified drive has a disk ID that matches a disk media record with no currently associated physical disk. After reconnection, any stale plexes referring the disk are reattached, and any stopped volumes referring the disk are restarted. This reattach action is performed by calling the volrecover script. ERRORS
You may receive the following messages when using the voldiskadd command: Initialization of disk device special-device failed. Error: special-device or an overlapping partition is open. This message indicates that the partition you specified or an overlapping partition on the disk is actively in use. The partition could be a mounted UFS or AdvFS filesystem, initialized as an LSM disk or used as a swap device. special-device is marked in use for fstype in the disklabel. If you continue with the operation you can possibly destroy existing data. Would you like to continue?? [y,n,q,?] (default: n) This message indicates that the fstype of a partition or an overlapping partition is set in the disk label. The voldiskadd command prints this message to warn that a disk partition may have valid data which could be destroyed. If you are sure that the disk partition does not have valid data and that the partition can be added to LSM, you can ignore the warning message by entering y at the prompt. The voldiskadd command will proceed to initialize the disk partition and add it to LSM. FILES
A list of disks to exclude from use by voldiskadd. SEE ALSO
disklabel(8), volassist(8), voldisk(8), voldiskadm(8), voldisksetup(8), voldg(8), volintro(8) voldiskadd(8)
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