[GTALUG] Disks are made of fragilium (was: GnuPG Woes...)

[David Collier-Brown]

On 12/30/2014 04:53 PM, Peter King wrote:
> Moral of the Story (one moral among many): Keep static time-stamped 
> backups as well as current redundant copies. Will implement a scheme 
> to do so this week, a better New Year's resolution than most!

This is way more common than people expect.

The ZFS folks found out that they needed to checksum disk files, 
somewhat to their surprise. ICL used to do it on a sector-by-sector 
basis as part of the sector footer, and would noisily recover when they 
detected problems.  Sun 3.5 did too, but you had to do the recovery by 
booting (!) /stand/diag

--dave

-- 
David Collier-Brown,         | Always do right. This will gratify
System Programmer and Author | some people and astonish the rest
davecb at spamcop.net           |                      -- Mark Twain