1.SH 2Sync Copy and WORM Copy Processes 3.PP 4The 5.CW scp 6process 7wakes up every ten seconds and 8issues writes to blocks in the buffer cache 9that have been modified. 10This is done automatically on important 11console commands such as 12.CW halt 13and 14.CW dump . 15.PP 16The 17.CW wcp 18process also wakes up every ten seconds 19and tries to copy a 20.CW dump 21block from the cache to the WORM. 22As long as there are 23.CW dump 24blocks to copy and there is no competition for 25the WORM device, 26the copy will continue at full speed. 27Whenever there is competition for the WORM 28or there are no more blocks to 29copy, 30then the process will sleep ten seconds 31before looking again. 32.PP 33The Sony WORM jukebox consists of 3450 disks divided into 100 sides 35or platters. 36Platter 0 is the 37.I A 38side of disk 0. 39Platter 1 is the 40.I A 41side of the disk 1. 42Platter 50 is the 43.I B 44side of disk 0. 45On Bootes, 46the main file system is configured 47on both sides of the first 45 disks, 48platters 0-44 and 50-94. 49Slots 46-49 are available for mounting 50blank disks for making backup copies of platters. 51To back up the logical 57th platter in the file system, which is physical platter 62, 52insert the blank platter in the input 53carrier and type 54.P1 55 wormingest 49 56 wormcp 62 49 57.P2 58To have the backup disk have the 59correct platters on its two sides, 60the blank platter inserted should be the 61.I B 62side up of the disk containing the 63backup of logical (and physical) platter 12. 64When the copy is done, type 65.P1 66 wormeject 49 67.P2 68