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Solaris system administration tutorials

begin_script to mirror two drives on a Netra T2000

Contributed by weezlboy on July 29, 2008 under Solaris system administration

This is a quick script to configure mirroring of two drives in a Netra T2000 under Solaris. You may need to alter the device settings for your system, but once you have a script like this that works, it can save lots of time when rolling out multiple servers and serves as a mental backup for the future when you need to repeat the configuration.

Solaris: Delete ZFS slices from a disk

Contributed by mind on February 15, 2008 under Solaris system administration

You know ZFS, it is really cool, you can have tons of filesystems in a zpool, you can create raidz/mirror/stripes with just one command, it has compression, quotas and every other cool feature that you can thought about.
But what happens if you have to move a ZFS disk to a Solaris 8/9 system?

ZFS: Ten reasons to reformat your hard drives

Contributed by qmchenry on June 16, 2006 under Solaris system administration

The much anticipated release of the new ZFS filesystem in Solaris 10 will revolutionize the way system administrators (and executives) think about and work with filesystems. Breaking free of the traditional volume or partition architecture, ZFS combines scalability and flexibility while providing a simple command interface. Coined by Sun as the “last word in filesystems,” ZFS is already being ported to several Linux distributions and Mac OSX. Designed to have at least a 30 year shelf life, this filesystem will make waves with its upcoming release in Solaris 10. We’ve been playing with ZFS for several months and have written some recipes about its basic administration. Here are ten reasons why you’ll want to reformat all of your systems and use ZFS.

ZFS: Create a writable clone of a filesystem

Contributed by qmchenry on June 14, 2006 under Solaris system administration

A ZFS clone is a writable copy of a snapshot of a filesystem. Phew. It’s much simpler than that sounded. While a filesystem snapshot is read-only, a writable version can be created through cloning. Just like snapshots, clones are very quick to create and use no additional space when they are created.

ZFS: Restore a filesystem from a snapshot backup

Contributed by qmchenry on under Solaris system administration

ZFS snapshots provide point-in-time backups of filesystems which utilize minimal disk space and CPU load. This, combined with the fact that you can make billions of billions of snapshots, makes taking frequent backups of filesystems a realistic possibility. This recipe describes restoring a filesystem from a snapshot.

ZFS: Create a snapshot of a filesystem

Contributed by qmchenry on under Solaris system administration

Of the many cool features of the new ZFS filesystems, one of the coolest is taking snapshots of a live filesystem. This provides a read-only point-in-time copy of the whole filesystem. While this sounds slow and expensive in disk usage, ZFS makes snapshots efficient in time and space.

ZFS: Create a raidz filesystem

Contributed by qmchenry on June 6, 2006 under Solaris system administration

ZFS supports a type of RAID-5 redundancy called raidz. This redundancy works at the ZFS pool level and affects all created filesystems in that pool. According to the Sun docs, raidz offers ‘better distribution of parity [than RAID-5] and eliminates the “RAID-5 write hole” (in which data and parity become inconsistent after a power loss).’ Creating RAID volumes in most volume managers (like VeritasVM) requires learning a new language describing the various components involved. ZFS requires one wee command.

ZFS: Destroy or remove one or more filesystems

Contributed by qmchenry on under Solaris system administration

If you no longer want a filesystem or hierarchy of filesystems, ZFS offers a (possibly too) easy mechanism for removing them. The destroy option of the zfs command unshares, unmounts, and obliterates filesystems.