"Least Recently Used" I think is the management level explanation of how it is done.
Andy Huebner -----Original Message----- From: ADSM: Dist Stor Manager [mailto:[EMAIL PROTECTED] On Behalf Of Richard Sims Sent: Wednesday, August 22, 2007 10:57 AM To: [email protected] Subject: Re: [ADSM-L] How does a library choose a drive? On Aug 22, 2007, at 11:32 AM, Mcnutt, Larry E. wrote: > TSM Server 5.3.3.0 > AIX 5.3 > > This is probably not a TSM specific question, but hopefully someone > can > point me to the right place to look. > We would like to understand how the library decides which available > drive to use. ... It doesn't decide: the host determines which drive to use. TSM uses them rotationally, to balance wear. For a 3494 library, see the MTIOCLM (Library Mount) library system call in the IBM SCSI Device Drivers Programming Reference for the nitty-gritty. For a SCSI library, where the host has to engage in more intricate control of library mechanics, I believe it's the SMCIOC_MOVE_MEDIUM call (Transport a cartridge from one element to another element). Richard Sims This e-mail (including any attachments) is confidential and may be legally privileged. If you are not an intended recipient or an authorized representative of an intended recipient, you are prohibited from using, copying or distributing the information in this e-mail or its attachments. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete all copies of this message and any attachments. Thank you.
