Hello Diego, You seem to be referring to two things;
The first is standard solaris technology, the second is Veritas Volume Manager. For google terms you can look for character (raw) or block (filesystem) devices. The difference is how they are access, as a stream of data or as a series of blocks.
A LUN is a logical unit number (SCSI term), this could be something as simple as a disk on the end of a SCSI cable or something more complex, such as virtual disk defined in a storage array such as a EMC or Hitachi array. Think of a LUN as a disk, if you don't know the difference, you probably don't need to just yet.
Plexes and Volumes are Veritas Volume Manager concepts. http://support.veritas.com has the best information on this, but a Volume is like a disk, but can be mirrored or striped or a few other combinations. Think of a volume like a LUN and you won't be far wrong, although there is more you can do with Volumes than you can do with LUNs. A plex is a sub component of a mirrored volume. A plex is one half of the mirror, each volume has at least one plex, each additional plex is an additional mirror of the data.
As for books, I think UNIX Storage Management discusses this. The veritas volume manager document, while quite large, provides a good introduction to the topics.
I hope this helps. Kind Regards, Nathan Dietsch On 24/06/2008, at 5:38 PM, Diego Giurgola wrote:
Hi there, I'm new to Solaris and the disk terminology. What is the difference between disks, raw disks, volumes, plex, LUN? I googled for a while, but I didn't get anything very useful. Thanks. Diego. _______________________________________________ Solaris-Users mailing list [email protected] http://www.filibeto.org/mailman/listinfo/solaris-users
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