Also, if using SSD in a raid array, you probably won't get a warning of impending failure, and you usually have devices with very similar lifetime of write and write history. Which can lead to the entire raid group going at once. https://www.reddit.com/r/homelab/comments/17h1xgh/how_do_you_mitigate_the_risk_of_simultaneous/
On Tue, Sep 17, 2024 at 3:13 PM Radoslaw Skorupka <[email protected]> wrote: > > W dniu 17.09.2024 o 18:04, Steve Estle pisze: > > A healthy tape would be defiined as a tape where you can successfully read > > the tape label and all written blocks on the tape volser without error (I/O > > error, equipment check, etc). > > Well, it is not so simple. > 1. Media. Healthy tape media is no longer important for majority of > installations, because nowadays we have VTS (any vendor) and last > physical tape (TS1140) is really old, no longer supported, etc. However > yes, healthy physical tape media means the tape can be read. From > beginning to end of volume. > 2. Healthy tape format. Yes, tapes have format. Labels, etc. Healthy > tape means existing labels and consistence between labels and between > labels and datasets (i.e. number of blocks). > 3. Healthy virtual tape "media". Actually the tape volume is a file. The > file is usually OK, however one can imagine broken format, i.e. > accidentally overwritten fileds or other logical errors. Very unlikely > IMHO, however some malware on VTS or just errors in microcode could do > this. > 4. Healthy physical media in VTS. Usually a VTS cache is RAID-protected > disk array, so the problems seems to be unlikely. Of course some VTSes > can offload virtual tape volumes on real tape - in that case the tape > can be duplicated or not. However such error could mean lost of volume > at all. > > My €0.02 > > -- > Radoslaw Skorupka > Lodz, Poland > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
