On Sat, Oct 29, 2016 at 03:29:51PM +0500, Roman Mamedov wrote: > And if there's an unreadable sector on rebuild as a drive found its 8th bad > sector after 3 more years of perfect operation, that's not a problem either, > because the setup they run in, is RAID6. But if such disks are acceptable to run in a RAID, and you advertize it as such, you have to expect to see RAIDs where every single disk has a dozen reallocated sectors and a history of read errors to go with it. Is that still fine? Do you expect to be lucky every time? RAID-6 is not magic, either. Sooner or later, it will fail, too. Keep ignoring errors in RAID-5 and you'll see double failure. Keep ignoring errors in RAID-6 long enough and you'll see triple failure. All disks fail and many of them do silently, undetected if untested. If you rented a server in a datacenter, thus entitled to working hardware, would you create a ticket on read failure or not? Regards Andreas Klauer -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
