Repartitioning Contiguous Space in Linux

As a follow up to the same under Solaris, I thought I'd detail
repartitioning in-use, contiguous space in Linux. To recap the
situational setup, a filesystem (FS) has run out of space and the data
contained on it couldn't be removed or compressed to free up space.

Repartitioning Contiguous Space in Solaris

Recently, a system owner aked me for help because they had run out of space on one of their filesystems (FS). As a result, this was causing problems with the application they had running. Unfortunately, this FS was being used for database files so we couldn't just remove or

Breaking and Syncing an MD Root Mirror

Here's one of those times where I thought, "I wonder", as in I wonder if
I can break an MD root mirror and sanely recreate it.  You can do so with
other software RAID solutions so why not here?  Well, you can.  There is
nothing short about this procedure, taking 80+ commands to accomplish.

Creating an MD Root Mirror in Linux

For whatever reason, you originally set up your Linux host without a root
disk mirror and now you want it mirrored.  One could say "just re-install,"
but surely there is another way, and there is.  The solution isn't quick
or simple, though it isn't impossible.  Our host details are:

Disk Cloning in Linux

A while back, I wrote up how to clone a disk in Solaris and in FreeBSD,
yet somehow managed to overlook writing up how to do so in Linux.
This write up is to rectify just that, how to clone a disk, in this case,
the root disk, in Linux.  The following are our setup details:

Mounting an SVM Root Disk from CDROM

The following illustrates how to mount a root disk under Solaris Volume
Manager (SVM) control when booted from a CDROM.  Our host details:

        HOST:                   snorkle

Replacing VxVM with SVM for the rootdisk

The purpose of this post is to illustrate how to replace Veritas Volume
Manager (VxVM) with Sun Volume Manager (SVM) for control of the root disk
while leaving application volumes under VxVM control.  I had originally
tested this against Solaris 9 sparc running VxVM 4.0, though have updated

Reassociating a Failed Disk in Veritas

Recently we had a situation wherein Vertias Volume Manager (VxVM)
marked a disk as 'failed' while additionally presenting the disk
available for use though unconfigured.  The weird part was that VxVM
continued to allow use of the volume until the volume was stopped.

Breaking and Syncing a SVM Root Mirror (Solaris)

INTRO

The information detailed below is to assist with proactive planning for
the potential demise and recovery of a host back to the state it was

Breaking and Syncing a Hardware Root Mirror (Solaris)

INTRO

The information detailed below is to assist with proactive planning for
the potential demise and recovery of a host back to the state it was

Recovering from a corrupted ext3 journal

Occasionally, an EXT3 volume's journal will become corrupted.  When
this occurs, Linux will proactively remount the volume in question as
read-only in attempt to stave off further data corruption, loss, etc.
When the volume is remounted r/o, lines similar to the following can be

Disk Cloning in FreeBSD

Disk Cloning in FreeBSD:

A few assumptions:
        master disk:  da0

Disk Cloning in Solaris

Disk Cloning in Solaris:

A few assumptions:
        master disk:  c0t0d0