On Fri, 8 Jun 2007 13:42:25 -0400, Tim Hare wrote: >Most virtual tape systems eventually write to physical tape as they >internally perform hierarchical storage management. There's an OS that >does HSM functions on a bunch of disk, and when the disk space gets full, >the "datasets" representing virtual tape volumes are written off to >physical tape. >
You can have it any way you want. You can have virtual tape systems backed by disk. It just looks like a tape device to the OS even though it's really disk. >>The robotic tape library I looked at is also virtual, but is >backed by physical tape. >>The costs to purchase a robotic tape library with about 250 cart capacity >is just over $400K. The cost to purchase 15TB of DASD or a >> virtual tape solution backed by DASD is around $200K. > >That is the cost of a robotic tape library _plus_ the virtual tape storage >box with it, if I am reading you right. Yes, Robotic library and VTL software together. >But that's not part of my original question either, I'm just trying to >find out whether the virtual tape component being 20% of the total cost is >legit or not. > My quote was a swag so isn't line item. I don't know what the hardware vs software costs are. Sorry. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
