On 13/06/15 21:11, Mikael Abrahamsson wrote: > On Sat, 13 Jun 2015, wiebittewas wrote: > >> for a larger archive, we're thinking about buying six >> 8TB-Archive-Disks from Seagate to build a 4+2 Raid6-Array. >> >> now we've seen, that these disks are told not-recommended for raid, >> because they lack ERC/TLER (like many desktop-disks) > > Not only that. > > You might want to read: > > http://www.spinics.net/lists/linux-ide/msg50641.html > > These drives are different beasts than regular HDDs, and we seem to be > seeing problems with them just the way SSDs were problematic in the > beginning. > > So you might want to reconsider using SMR drives for RAID use. I was > considering them until I read up on them, and then I decided it was too > early in the deployment cycle to use them for RAID use. > I didn't know these were shingled drives ... does the OP know what a shingled drive is? Basically, to get decent performance out of these drives, you have to stream data at them - they're more like a tape-drive than a random-access disk. So. They're great for backups, much less so for normal use. Cheers, Wol -- 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
