1219b2ee8SDavid du Colombier.SH 2219b2ee8SDavid du ColombierSync Copy and WORM Copy Processes 3219b2ee8SDavid du Colombier.PP 4219b2ee8SDavid du ColombierThe 5219b2ee8SDavid du Colombier.CW scp 6219b2ee8SDavid du Colombierprocess 7219b2ee8SDavid du Colombierwakes up every ten seconds and 8219b2ee8SDavid du Colombierissues writes to blocks in the buffer cache 9219b2ee8SDavid du Colombierthat have been modified. 10219b2ee8SDavid du ColombierThis is done automatically on important 11219b2ee8SDavid du Colombierconsole commands such as 12219b2ee8SDavid du Colombier.CW halt 13219b2ee8SDavid du Colombierand 14219b2ee8SDavid du Colombier.CW dump . 15219b2ee8SDavid du Colombier.PP 16219b2ee8SDavid du ColombierThe 17219b2ee8SDavid du Colombier.CW wcp 18219b2ee8SDavid du Colombierprocess also wakes up every ten seconds 19219b2ee8SDavid du Colombierand tries to copy a 20219b2ee8SDavid du Colombier.CW dump 21219b2ee8SDavid du Colombierblock from the cache to the WORM. 22219b2ee8SDavid du ColombierAs long as there are 23219b2ee8SDavid du Colombier.CW dump 24219b2ee8SDavid du Colombierblocks to copy and there is no competition for 25219b2ee8SDavid du Colombierthe WORM device, 26219b2ee8SDavid du Colombierthe copy will continue at full speed. 27219b2ee8SDavid du ColombierWhenever there is competition for the WORM 28219b2ee8SDavid du Colombieror there are no more blocks to 29219b2ee8SDavid du Colombiercopy, 30219b2ee8SDavid du Colombierthen the process will sleep ten seconds 31219b2ee8SDavid du Colombierbefore looking again. 32219b2ee8SDavid du Colombier.PP 337dd7cddfSDavid du ColombierThe HP WORM jukebox consists of 347dd7cddfSDavid du Colombier238 disks divided into 476 sides 35219b2ee8SDavid du Colombieror platters. 36219b2ee8SDavid du ColombierPlatter 0 is the 37219b2ee8SDavid du Colombier.I A 38219b2ee8SDavid du Colombierside of disk 0. 39219b2ee8SDavid du ColombierPlatter 1 is the 40219b2ee8SDavid du Colombier.I A 41219b2ee8SDavid du Colombierside of the disk 1. 427dd7cddfSDavid du ColombierPlatter 238 is the 43219b2ee8SDavid du Colombier.I B 44219b2ee8SDavid du Colombierside of disk 0. 457dd7cddfSDavid du ColombierOn Emelie, 46219b2ee8SDavid du Colombierthe main file system is configured 477dd7cddfSDavid du Colombieron both sides of the first 237 disks, 48*6aeb1f0cSDavid du Colombierplatters 0\-236 and 238\-474. 49