Articles in Disks and Volumes
The following is a brief overview of the process for adding LUNs to VXVM under Linux. In our example we have an RHEL 5 server with existing LUNs and VXVM volume groups. Two new LUNs with multipathing were allocated from SAN and need to be added to the system to grow one of the volumes and the corresponding filesystem.
Recently I upgraded a client’s Vista computer (Toshiba Qosmio, 4Gb, Intel Core Duo P7350, 7200-RPM 200-Gb disk) from Vista Ultimate 64-bit to Windows 7 Ultimate 64-bit. Being a Unix sysadmin this is not something I usually do. How did the experience compare to upgrading HP-UX, Solaris or SLES? In a nutshell: I’d rather walk around all day in wet underwear than attempt to upgrade Vista ever again.
Bonnie++ is a benchmark utility designed to test performance of hard drives and filesystems by simulating various types of disk I/O. Bonnie++ may be used to test local disks as well as network-mounted filesystems. It …
When performing a new Unix OS installation you are usually presented with a choice of accepting the default partitioning layout or going into advanced settings and defining your own partitions. The default layout will normally …
This is a quick-and-dirty guide to recovering VxVM volumes and filesystems on a Solaris server. These instructions are not intended to be an in-depth troubleshooting guide for the Veritas Volume Manager. This is just something …
The cost of storage arrays is falling along with the quality of their manufacture. To quote Lev Andropov from the “Armageddon”: “Components. American components, Russian Components, ALL MADE IN TAIWAN!” What in the nineties used …
The this is a description of a method for recovering ReiserFS filesystems from failed disks with bad blocks, when other recovery methods (reiserfsck) will not work. For this example, the failed server is called node1 …
Rather than rebuilding an Informix database on the new HP-UX server, it possible to migrate the existing installation from the old server. The database resides on raw disks with transparent volumes that are not visible …
Several Veritas VM and system logs can be used to monitor and diagnose problems with the Volume Manager. An automated script can be used to grab the last few lines from these logs whenever a …
The following is an overview of the GUI for Veritas Enterprise Administrator 3.2
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Boot into one of the operating systems you would like to keep (i.e. Windows, Linux, etc.) and set its partition as “Active”. Reboot your system. If the system boots into the OS of your choice …
When creating a multiboot system with Windows XP and Solaris 10 you need to install Windows XP first. If Windows is already installed, repartition the hard drive to allocate sufficient space for your Solaris installation. …
To make a Solaris disk bootable you need to install the boot block on the disk. This should be done, for example, after copying the primary boot disk to the secondary disk.
installboot /usr/platform/`uname -i`/lib/fs/ufs/bootblk /dev/rdsk/c0t1d0s0
Replace …
The following script will duplicate a Solaris boot disk. The script uses ufsdump/restore as opposed to dd, so disks of different sizes can be used.
#!/bin/sh
EMAIL=admin@domain.com
SUBJECT="Boot disk copy on `hostname`"
if [ "$#" != 2 ] ; …
Instructions for adding swap space on the fly for a Solaris system. Adding swap space via a swap file degrades system perfomance. However, this is a useful method for quickly adding swap space without interrupting …
share -F nfs -o ro,anon=0 /cdrom/cdrom0
mount -o ro server:/cdrom/cdrom0 /cdrom
if target server responds: RPC: Program not registered
do
/etc/init.d/nfs.server start
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The following is a collection of examples using fsck command. It is important to unmount VXFS before running fsck on Veritas filesystem.
to fsck a Veritas FS:
fsck -F vxfs /dev/dsk/c2t2d0s0
to do a full fsck of Veritas …
