>Aren't the DASDs virtual in the storage boxes?? Tracks >are living >anywhere!?
That may be true for the RVA, which is a log structured array (paging) device that maps a page anywhere in the backend. On a shark, each LSS is a separate RAID 5 group and device addresses are assigned sequentially in the LSS, so if multiple devices are assigned to the same LSS, they are limited to a speed of the LSS. For example, for on an E20 shark, each LSS has a bandwidth of 40 mb/sec, but the total bandwidth is about 160 mb sec. If you put all your stripes in a single LSS, you will only get 40 mb/sec, total, maximum. The only way to get the full bandwidth is to put volumes in the stipes in different LSS. I don't know the figures for later version sharks. I'll find out. ===== Jim Sibley "Computers are useless.They can only give answers." Pablo Picasso (The NSHO's expressed here represents no-one but myself). __________________________________ Do you Yahoo!? Vote for the stars of Yahoo!'s next ad campaign! http://advision.webevents.yahoo.com/yahoo/votelifeengine/ ---------------------------------------------------------------------- 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
