Recent content by FlawlessMind

@Essence_of_War As you suggested getting 4kN earlier do you think there is any difference in terms of ZFS performance involved justifying the extra cost? My understanding is that 512e drives would be used as 4k drives and new vdevs with such drives would be automatically created with ashift=12...

Well just another reason I hate non-profits and doing projects for such organizations. They understand the consequences but they just don't want to spend the extra money LOL Well I am not sure about that, the more you read from a drive the more chances you have for URE, still somebody with...

Sorry if I wasn't clear enough in my statements so far ;( Don't get me wrong, I desperately want to set that as a pool full of mirrors. I just keep fighting with myself about it, especially given the fact there would be no backup in place and I am not the one deciding on that. Theoretically...

From what I remember if a checksum could not be verified in a healthy mirror, ZFS would try to re-read the data and if it fails against the checksum again it will pull the data from the other member of the mirror and try to recover (write back) the data to the bad member. In case there is a...

Well I will have to disagree with you. If you have a Raidz2 with one failed drive and you re-silver from all other that hold parity even if another drive has URE and serves bad data that would be detected as the parity would have bad checksum. In that case parity from the remaining drives will...

Pardon me if I didn't use the right term, I thought these are always called re-silvers? I know how mirrors work, but again my point here is, okay you will be able to re-mirror' and keep all of your other data if there are URE's on the remaining drive, but you also end-up having a data corruption...

As I need to get SAS drives by design with the 7k4000 the only available option for SAS is 512n and the price difference for a new drive compared to 512e 7k6000 is only 10$/drive in favor of the 7k4000. The storage would be used for two hypervisors with about 30 VMs on each, mixed set of...

Off-topic but I am very happy with Hitachi and I would like to keep using them, but in that particular case I have to pay 35% premium for HGST Ultrastar 7k6000 4TB over Seagate Enterprice Capacity 3.5 4TB which doesn't really make me happy.

Which really should not be the case given the fact they have less elements (lacking the CPU that is used for the emulation tasks). Still I would like to understand if the behavior would be the same between the two drives. Theoretically speaking and speculating of course I agree with that if we...

You can still replace 512n drives with 512e drives as far as I understand. You can not replace these with 4kN. The real question here though is: 1) Is there any difference between 512e and 4kn from ZFS point of view and from drive point of view when ZFS writes/reads from it, that would justify...

Guys, I will try to keep it very short as I tend to get into unnecessary details. My ultimate goal is to choose between using 512n, 512e, or pure 4kN drives for a new ZFS storage appliance that will either consist of eight 4TB drives in four mirror VDEVs, or eventually Raidz2 in order to...

Hello guys, I've been doing a lot of research for the last two weeks but I couldn't find any good information related to GPU benchmarks as it goes to photo and video editing with the latest nVidia and AMD GPUs. I am doing landscape photography and I am shooting with DSLRs as well as medium...