John, No spares in the array? Or did a fail-over fail as well? If no spares, that sounds more like a bone-headed management move to try to save a couple bucks. Not absolving the admin from responsibility but it sounds like a bigger problem.
Rex -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of John McKown Sent: Tuesday, June 11, 2019 8:06 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: [External] Re: Hybrid SMS Storage Group - Database On Tue, Jun 11, 2019 at 7:40 AM Mike Schwab <mike.a.sch...@gmail.com> wrote: > The problem with SSD storage is that the blocks in a matched set of > device start to fail at the same rate. Run long enough and you get > enough bad blocks in all devices and they all fail at roughly the same > time loosing the entire raid group, you don't have enough time between > failures to replace and recreate before the next drive goes. Close > monitoring of the physical failure rate is important to start swapping > and rebuilding raid. > This can happen with HDs also. We (Windows LAN) had a catastrophic failure years ago. On the weekend, the LAN backups failed. The storage admin decided "no problem I'll fix it Monday". We had an HD in the array fail. "No problem, RAID will keep us going." While the CE was on his way in to replace the failed HD, a second drive in the array failed. No array. No current backup. Result: New storage administrator. > > https://news.ycombinator.com/item?id=12046524 > > -- This is clearly another case of too many mad scientists, and not enough hunchbacks. Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN The information contained in this message is confidential, protected from disclosure and may be legally privileged. If the reader of this message is not the intended recipient or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any disclosure, distribution, copying, or any action taken or action omitted in reliance on it, is strictly prohibited and may be unlawful. If you have received this communication in error, please notify us immediately by replying to this message and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
