Basic Storage

> can somebody tell me the difference between the raid

> manager, veritas volume manager, solaris disk suit.

>

> Regards

> ajain12

RAID Manager is used to configure the external hardware RAID array to combine physical disks into the appropriate number of LUNs carved from a RAIDset to be presented to one or more hosts.

Veritas Volume Manager is a way of further abstracting over the LUNs presented by RM (or indeed just a bunch of disks) at a host level. Typically, VxVM is used to allow the raw storage to be carved up in a way that suits the application. VxVM can be expensive depending on the number of processors in your machine (huh - processors and not storage?:-)

Solstice Disksuite, (aka SVM) is a competing product which is bundled with the operating environment. Whilst it is included, this does not mean it's inferior to VxVM and there are a number of users moving off VxVM to SVM to keep costs down.

VxVM and SVM also offer the facility to share disk between hosts. O/S's typically need exclusive access to their storage (unless you're using something like QFS to allow multiple access) and the volume managers offer a locking mechanism to ensure this exclusivity.

Hope this helps.

--s.

Saladdaze at 2007-7-5 18:04:12 >