I've been testing mirroring root partitions for the past few days within a virtual environment and on an old ML350. However, the live system that this is practice for has two disks, and they're non-identical.
I've done a bit of searching through the forum and see that a lot of people recommend just calculating the partitions for the second disk manually. However, I'm a bit of a noob when it comes to doing so, so was wondering if somebody could offer any advice/help.
Here are the two partition tables as they are at the moment:
Firstly - am I right in thinking the disks are (on paper) roughly equal in size (i.e. they share a similar number of sectors, and are both 512bytes/sector)?
Secondly, will prtvtoc/fmthard use the sector positions rather than the cylinder counts when labelling the new disk? Because if so am I right in thinking that the unallocated space on the end of c1t1d0 should mean that a straight copy of the VTOCs between disks is possible? (That is, the current disk's assigned partitions don't overflow past the new disks available sectors?)
Any advice would be greatly appreciated - I can only test so much, and unfortunately this part can only be tested on the live system because I don't have unequal disks to test with
Hi,
I am taking backup in every hr and every day, I want to programmatically check my backup files are identical with original files. Any methods are available in Unix scripts? Any idea.? I don't want to download both and compare, I looking for idea to develop a script to read both files and... (3 Replies)
hello everybody,
I have a system in Solaris 8 with SDS 4.2.1
I need to mirror the system disk which has the following characteristics :
* /dev/rdsk/c0t0d0s2 partition map
*
* Dimensions:
* 512 bytes/sector
* 133 sectors/track
* 27 tracks/cylinder
* 3591 sectors/cylinder... (3 Replies)
I tarred a directory from a linux server to a solaris server. When I do a du -s -k on the directory, I get almost 150k difference in the file sizes. If I do a ls | wc -l, it is the same. If I look at the size of the individual files, it is the same.
I did an ls on the 2 directories and... (6 Replies)
Hi.
I have a SLES10 machine which until recently had only one disk. Now there is a second disk which I would like to mirror my OS installation to. I have three partitions, first one for /boot (~100M), the second one for / (~1G) and then the rest as a LVM partition with several volumes under... (0 Replies)
Hello Experts,
I have two files called "old" and "new". My old file contains 10 lines and my new file contains 10 + "n" lines.
The first field in both these files contain ID. I sort these two files on ID. I am interested in only the lines that are in the new file and not in old.
I tried... (4 Replies)
Hi All,
I am having hard time in getting two almost identical rows into one, I know how to do if starting word is unique, anyhow this is my problem
Input File:
issue1 5167
dum 1 1 kkk 7888
dum 2 1 ffff 7888
dum 2 2 llll 7888
dum 3 1 eee 7888
issue2 7667
dum 2 1 jjjj 8999
dum 2 2 jjjj... (3 Replies)
Hi, need some guidance, maybe I don't understand the term 3 or 4 way mirror.
I have 4 disks. All of same capacity. Need to 3-way mirror the disks for the OS using SVM (4 Replies)
Hello All,
I am trying to mirror two non-root hard drives using zfs. But "fmthard" fails when I try to copy the vtoc due to disk mismatch. Please help me.
--- iostat command shows the disk to be similiar
--- format command shows disk to be different :confused:
--- c1t2d0 is the active... (8 Replies)
I have my Ubuntu system nicely tailored to my needs, with specific software installed, and other things removed.
I'd like to build a new PC, and have the identical software configuration on it. Is there some easy way to export the list of installed software to a file? Then have the new machine... (3 Replies)
Discussion started by: lupin..the..3rd
3 Replies
LEARN ABOUT POSIX
prtvtoc
prtvtoc(1M) System Administration Commands prtvtoc(1M)NAME
prtvtoc - report information about a disk geometry and partitioning
SYNOPSIS
prtvtoc [-fhs] [-t vfstab] [-m mnttab] device
DESCRIPTION
The prtvtoc command allows the contents of the label to be viewed. The command can be used only by the super-user.
The device name can be the file name of a raw device in the form of /dev/rdsk/c?t?d?s2 or can be the file name of a block device in the
form of /dev/dsk/c?t?d?s2.
OPTIONS
The following options are supported:
-f Report on the disk free space, including the starting block address of the free space, number of blocks, and unused parti-
tions.
-h Omit the headers from the normal output.
-m mnttab Use mnttab as the list of mounted filesystems, in place of /etc/mnttab.
-s Omit all headers but the column header from the normal output.
-t vfstab Use vfstab as the list of filesystem defaults, in place of /etc/vfstab.
EXAMPLES
Example 1: Using the prtvtoc Command
The following example uses the prtvtoc command on a 424-megabyte hard disk:
example# prtvtoc /dev/rdsk/c0t3d0s2
* /dev/rdsk/c0t3d0s2 partition map
*
* Dimension:
* 512 bytes/sector
* 80 sectors/track
* 9 tracks/cylinder
* 720 sectors/cylinder
* 2500 cylinders
* 1151 accessible cylinders
*
* Flags:
* 1: unmountable
* 10: read-only
* * First Sector Last
* Partition Tag Flags Sector Count Sector Mount Directory
0 2 00 0 76320 76319 /
1 3 01 76320 132480 208799
2 5 00 0 828720 828719
5 6 00 208800 131760 340559 /opt
6 4 00 340560 447120 787679 /usr
7 8 00 787680 41040 828719 /export/home
example#
The data in the Tag column above indicates the type of partition, as follows:
Name Number
UNASSIGNED 0x00
BOOT 0x01
ROOT 0x02
SWAP 0x03
USR 0x04
BACKUP 0x05
STAND 0x06
VAR 0x07
HOME 0x08
ALTSCTR 0x09
CACHE 0x0a
RESERVED 0x0b
The data in the Flags column above indicates how the partition is to be mounted, as follows:
Name Number
MOUNTABLE, READ AND WRITE 0x00
NOT MOUNTABLE 0x01
MOUNTABLE, READ ONLY 0x10
Example 2: Using the prtvtoc Command with the -f Option
The following example uses the prtvtoc command with the -f option on a 424-megabyte hard disk:
example# prtvtoc -f /dev/rdsk/c0t3d0s2
FREE_START=0 FREE_SIZE=0 FREE_COUNT=0 FREE_PART=34
Example 3: Using the prtvtoc Command on a Disk Over One Terabyte
The following example uses uses the prtvtoc command on a disk over one terabyte:.
example# prtvtoc /dev/rdsk/c1t1d0s2
* /dev/rdsk/c1t1d0s2 partition map
*
* Dimensions:
* 512 bytes/sector
* 3187630080 sectors
* 3187630013 accessible sectors
*
* Flags:
* 1: unmountable
* 10: read-only
*
* First Sector Last
* Partition Tag Flags Sector Count Sector Mount Directory
0 2 00 34 262144 262177
1 3 01 262178 262144 524321
6 4 00 524322 3187089340 3187613661
8 11 00 3187613662 16384 318763004
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO devinfo(1M), fmthard(1M), format(1M), mount(1M), attributes(5)WARNINGS
The mount command does not check the "not mountable" bit.
SunOS 5.10 25 Jul 2002 prtvtoc(1M)
02-21-2011
