William H. Magill on 14 Feb 2004 22:11:02 -0000


[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

Re: [PLUG] Interview Questions: System Admin


Other items to know: What is a superblock and what kind of data is in it?

Other than for the pure macho geekieness of it, what earthly good is knowing the disk structure today?


Any file system broken enough to need the alternate superblock is too broken to use... after all, that is why you have backups.

Any Unix today that requires one to play with the file system at the superblock level is also too broken to use in any kind of production environment. It is simply not "production quality," let alone "state of the art."

All that kind of stuff went away with the development of fsck some 20+ years ago.

While playing with superblocks and file system structure may be fine on a hobby system, a commercial system cannot afford the downtime, the introduced lack of reliability associated with playing with the file system on the bit level or the time while someone plays -- that time is better spent on recovery which you are willing to "bet the company on."



T.T.F.N.
William H. Magill
# Beige G3 - Rev A motherboard - 768 Meg
# Flat-panel iMac (2.1) 800MHz - Super Drive - 768 Meg
# PWS433a [Alpha 21164 Rev 7.2 (EV56)- 64 Meg]- Tru64 5.1a
# XP1000 - [Alpha EV6]
magill@mcgillsociety.org
magill@acm.org
magill@mac.com

___________________________________________________________________________
Philadelphia Linux Users Group         --        http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug