On Wednesday, 11/23/2005 at 09:37 PST, zSeries Linux <[EMAIL PROTECTED]> wrote: > We're doing some hardware spec'ing and will be installing FICON adapters > in our 890 and 990. My question is this: Are these adapters (and ports) > sharable between LPARs? Once in VM they should be sharable between > guests, correct? We plan on moving DASD and native tape to emulated SCSI > in Linux. > > Pretty simple question eh... If someone can shoot me links to any > related doc's out of IBM I'd really appreciate it.
Every chpid has associated subchannels. How you distribute the subchannels among LPARs is up to you (specified in the I/O config, e.g. IOCP) Subject to support in CP, any subchannel visible to CP can be given to a guest. With the exception of multi-user ATTACH of a tape drive, a particular subchannel can be attached to only one guest at a time. For example, if two guests want to use a FICON adapter at the same time, then multiple subchannels must be defined on the FICON chpid and each guest given access to some number of those subchannels. Alan Altmark z/VM Development IBM Endicott ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
