Increasing size of Root Partition

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Operating Systems Solaris Increasing size of Root Partition
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Old 11-23-2007
So we can transfer the move the free space from SWAP partition to root....u may be knowing the we can increase the size of swap... so firstly we just increase the swap size and then we add that part to root. is that possible... what the procedure for that...
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GROWFS(8)						    BSD System Manager's Manual 						 GROWFS(8)

growfs -- grow size of an existing ufs file system SYNOPSIS
growfs [-Ny] [-s size] special DESCRIPTION
The growfs utility extends the newfs(8) program. Before starting growfs the disk must be labeled to a bigger size using bsdlabel(8). If you wish to grow a file system beyond the boundary of the slice it resides in, you must re-size the slice using fdisk(8) before running growfs. If you are using volumes you must enlarge them by using vinum(8). The growfs utility extends the size of the file system on the specified special file. Currently growfs can only enlarge unmounted file systems. Do not try enlarging a mounted file system, your system may panic and you will not be able to use the file system any longer. Most of the newfs(8) options cannot be changed by growfs. In fact, you can only increase the size of the file system. Use tunefs(8) for other changes. The following options are available: -N ``Test mode''. Causes the new file system parameters to be printed out without actually enlarging the file system. -y ``Expert mode''. Usually growfs will ask you if you took a backup of your data before and will do some tests whether special is cur- rently mounted or whether there are any active snapshots on the file system specified. This will be suppressed. So use this option with great care! -s size Determines the size of the file system after enlarging in sectors. This value defaults to the size of the raw partition specified in special (in other words, growfs will enlarge the file system to the size of the entire partition). EXAMPLES
growfs -s 4194304 /dev/vinum/testvol will enlarge /dev/vinum/testvol up to 2GB if there is enough space in /dev/vinum/testvol. SEE ALSO
bsdlabel(8), dumpfs(8), fdisk(8), ffsinfo(8), fsck(8), newfs(8), tunefs(8), vinum(8) HISTORY
The growfs utility first appeared in FreeBSD 4.4. AUTHORS
Christoph Herrmann <> Thomas-Henning von Kamptz <> The GROWFS team <growfs@Tomsoft.COM> BUGS
The growfs utility works starting with FreeBSD 3.x. There may be cases on FreeBSD 3.x only, when growfs does not recognize properly whether or not the file system is mounted and exits with an error message. Then please use growfs -y if you are sure that the file system is not mounted. It is also recommended to always use fsck(8) after enlarging (just to be on the safe side). For enlarging beyond certain limits, it is essential to have some free blocks available in the first cylinder group. If that space is not available in the first cylinder group, a critical data structure has to be relocated into one of the new available cylinder groups. On FreeBSD 3.x this will cause problems with fsck(8) afterwards. So fsck(8) needs to be patched if you want to use growfs for FreeBSD 3.x. This patch is already integrated in FreeBSD starting with FreeBSD 4.4. To avoid an unexpected relocation of that structure it is possible to use ffsinfo -g 0 -l 4 on the first cylinder group to verify that nbfree in the CYLINDER SUMMARY (internal cs) of the CYLINDER GROUP cgr0 has enough blocks. As a rule of thumb for default file system parameters one block is needed for every 2 GB of total file system size. Normally growfs writes this critical structure to disk and reads it again later for doing more updates. This read operation will provide unexpected data when using -N. Therefore, this part cannot really be simulated and will be skipped in test mode. BSD
September 8, 2000 BSD