On Mon, 2004-07-19 at 07:36, Ash wrote: > Hi > I recently started using JFS and had a few basic > questions to ask: > > 1. I could not see any "Size" option in mkfs.jfs. I > presume that means the FS I create will always fill up > the available partition size. Is there any way to > explicitly specify the size of the FS being created ?
Not currently. I have in the past hacked up mkfs to do this for testing, but I didn't really anticipate a public need for this. It would be an easy feature to add. > 2. From the docs, I read that resize is possible with > "mount -o remount,resize /mount point". I tried > specifying resize=<some number> but it does not seem > to work and gives me "bad option" errors. That should work. <some number> should be the number of 4K blocks. If the new size is larger than the partition, remount fails with the "bad option" message. You may get a better message from dmesg. > Putting #1 > and #2 together, it looks like if I increase the > partition size of an existing JFS partition and then > do a "mount remount,resize", it will basically > increase the size of my FS to the new partition size. > Is this correct ? Yes > Is there any option in this case to > specify size explicitly ? resize=<new number of blocks> is supposed to work. > > 3. Is there any way to shrink the FS ? No. > > 4. What are the defragmentation issues? How do I find > out to what extent is my FS defragmented ? Is there > any tool to defrag a JFS partition. Not yet. One has been on my todo list, but hasn't received much attention. :^( > Any help/docs/pointers will be greatly appreciated. > > Thanks > Ashish Thanks, Shaggy -- David Kleikamp IBM Linux Technology Center _______________________________________________ Jfs-discussion mailing list [EMAIL PROTECTED] http://www-124.ibm.com/developerworks/oss/mailman/listinfo/jfs-discussion
