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Disk Mirrors in Reliant Unix - Problem?

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Special Forums Hardware Filesystems, Disks and Memory Disk Mirrors in Reliant Unix - Problem?
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Old 12-16-2004
Disk Mirrors in Reliant Unix - Problem?
Hi Folks,

This one has me a bit confused.

I have a large system running Reliant 5.45 with an EMC 3930 disk array fibre attached. As part of our requirement I implemented host level mirroring in addition to the BCV functionality provided by the 3930.

When the mirrors are split and the second mirror is mounted on a different mount point the size appears to be incorrect.

e.g. the mirror is vdisk302

/dev/vd/vdisk302 41943040 23017929 18877168 55% /ciblive/batch/production/files/dailey

the submirror is vdisk202

/dev/vd/vdisk202 4179408 2680498 1448144 65% /export_aix/ciblive/batch/production/files/daily

If the disk is unmounted and mounted again using the same command the info is correct.

The application is stopped while the mirrors are split and an fsck is run over the second mirror to ensure that it will mount.

Any one seen this before?

Rgds

Dave
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LEARN ABOUT NETBSD

newfs_v7fs

NEWFS_V7FS(8)						    BSD System Manager's Manual 					     NEWFS_V7FS(8)

NAME

     newfs_v7fs -- construct a new 7th Edition(V7) File System

SYNOPSIS

     newfs_v7fs [-FZ] [-B byte-order] [-n inodes] [-s sectors] [-V verbose] special

DESCRIPTION

     newfs_v7fs builds a 7th Edition(V7) file system on the specified special.	If it is a device, the size information will be taken from the
     disk label and before running newfs_v7fs the disk must be labeled using disklabel(8); the proper fstype is ``Version 7''.	Otherwise, the
     size must be specified on the command line.  V7 filesystem's block size and sector size are 512 byte.  Disk address limits are 24 bit.

     The following arguments are supported:

     -B byte-order    Specify the metadata byte order of the file system to be created.  Valid byte orders are 'be', 'le', and 'pdp'.  If no byte
		      order is specified, the file system is created in host byte order.

     -F 	      Create file system to a regular file (needs the -s option).

     -n inodes	      This specifies the number of inodes for the filesystem.  If the number of inodes exceeds 65536, it is reduced to 65536.

     -s sectors       Create file system with specified number of disk sectors.

     -V verbose       This controls the amount of information written to stdout:
			    0	 No output.
			    1	 Overall size, ilist size, endian and filename length.
			    2	 A progress bar.
			    3
			    4	 More verbose message.
		      The default is 3.

     -Z 	      Fill file with zeroes instead of creating a sparse file.

SEE ALSO

     disklabel(5), disktab(5), disklabel(8), diskpart(8)

BSD
								  April 29, 2011							       BSD