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Operating Systems
Solaris
SPARC, data sectors/track
Post 302523479 by orange47 on Thursday 19th of May 2011 02:55:32 AM
05-19-2011
perhaps. but why would solaris need them?
it seems that maximum number of sectors per track is 256.
is that some limit in Solaris 8?
drive is 70Gb. it already has been labeled with much higher number of sectors per track than 256. I just cant use that value again.
it has factory label SUN72G (424 sectors per track). I am trying to reduce total number of cylinders.
edit: I made some progress by increasing the number-of-heads while decreasing sectors-per-track, so that multiply product is the same. Still, it results in totaly wrong partition table..
edit2: it seems the problem was in Solaris8, because Solaris9 reports no error.
it seems that maximum number of sectors per track is 256.
is that some limit in Solaris 8?
drive is 70Gb. it already has been labeled with much higher number of sectors per track than 256. I just cant use that value again.
it has factory label SUN72G (424 sectors per track). I am trying to reduce total number of cylinders.
edit: I made some progress by increasing the number-of-heads while decreasing sectors-per-track, so that multiply product is the same. Still, it results in totaly wrong partition table..
edit2: it seems the problem was in Solaris8, because Solaris9 reports no error.
Last edited by orange47; 05-20-2011 at 03:50 AM..
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DISKTAB(5) File Formats Manual DISKTAB(5) NAME
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Disktab is a simple date base which describes disk geometries and disk partition characteristics. The format is patterned after the term- cap(5) terminal data base. Entries in disktab consist of a number of `:' separated fields. The first entry for each disk gives the names which are known for the disk, separated by `|' characters. The last name given should be a long name fully identifying the disk. The following list indicates the normal values stored for each disk entry. Name Type Description ns num Number of sectors per track nt num Number of tracks per cylinder nc num Total number of cylinders on the disk b0 str Filename of block zero primary bootstrap for device ba num Block size for partition `a' (bytes) bd num Block size for partition `d' (bytes) be num Block size for partition `e' (bytes) bf num Block size for partition `f' (bytes) bg num Block size for partition `g' (bytes) bh num Block size for partition `h' (bytes) fa num Fragment size for partition `a' (bytes) fd num Fragment size for partition `d' (bytes) fe num Fragment size for partition `e' (bytes) ff num Fragment size for partition `f' (bytes) fg num Fragment size for partition `g' (bytes) fh num Fragment size for partition `h' (bytes) pa num Size of partition `a' in sectors pb num Size of partition `b' in sectors pc num Size of partition `c' in sectors pd num Size of partition `d' in sectors pe num Size of partition `e' in sectors pf num Size of partition `f' in sectors pg num Size of partition `g' in sectors ph num Size of partition `h' in sectors se num Sector size in bytes (default 512) sf bool supports bad144-style bad sector forwarding so bool partition offsets in sectors ty str Type of disk (e.g. removable, winchester) Disktab entries may be automatically generated with the diskpart program. FILES
/etc/disktab SEE ALSO
newfs(8), diskpart(8), getdiskbyname(3) BUGS
This file shouldn't exist, the information should be stored on each disk pack. 4.2 Berkeley Distribution May 17, 1986 DISKTAB(5)