Path: utzoo!mnetor!uunet!wucs1!wuibc!sgistl!larry From: larry@sgistl.SGI.COM (Larry Autry) Newsgroups: comp.unix.wizards Subject: Re: Disk to disk copies Message-ID: <5601@sgistl.SGI.COM> Date: 5 May 88 11:31:36 GMT References: <13119@brl-adm.ARPA> <77@tarkus.UUCP> <346@cloud9.UUCP> <3149@saturn.ucsc.edu> Organization: Silicon Graphics, Inc., Mt.View, CA., St.Louis Ofc. Lines: 35 Summary: Partitions and labels. In article <3149@saturn.ucsc.edu>, haynes@ucscc.UCSC.EDU (99700000) writes: -> BTW, if you copy disk-to-disk on the 'a' partition on something -> like a Sun that uses disk labels, be aware that you also copy -> the label. -> -> haynes@ucscc.ucsc.edu -> haynes@ucscc.bitnet -> ..ucbvax!ucscc!haynes Here is a label. There is only one on the disk. fs base size sectors(cylinders) a: 320( 1), 18880( 59) Root <- no label here b: 19200( 60), 32000( 100) Swap c: 51200( 160), 64000( 200) d: 115200( 360), 142720( 446) f: 51200( 160), 206720( 646) g: 320( 1), 257600( 805) h: 0( 0), 257920( 806) <- label is here Partition 'h' includes the label. You need to 'dd' copy a partition that does not include cylinder (or track) 0. Cylinder 0 is normally the location of bad block information as well. From my experience, it is ok to copy partition 'c' on a disk to partition 'c' on another. You are well advised not to copy partition 'h' if 'h' on your system is the definition of the entire disk including the label. Unless I am mistaken, all hard disks used with Un*x need to have labels. If Sun's disk starts at '0' then that may be problem in this case. -- Larry Autry larry@sgistl.sgi.com or {ucbvax,sun,ames,pyramid,decwrl}!sgi!sgistl!larry