I had 550MB from four 500GB SATA Barracuda drives. However, in mdadm RAID0.
RAID6 is very CPU-intensive. Go with RAID10, suppose to have higher write rates.
I've tested it on 12 drives, in best scenario 1/2 of them (six) can die, leaving data unaffected, depending on which will be dead. In the worst - only two.
As You can see there is rebuliding rate limit (200MB/s), can be check at:
@TomTeneg "RAID6 is very CPU-intensive" yeah duh... Thats why we use 500+ a pop dedicated raid controllers instead of those cheap ass fake onboard raid support you got 4 free with your consumer grade motherboard.
Go with raid 10 when you are poor and don't have the bucks to buy decent dedicated raid controllers.
@TomTeneg With regards to your own private porn library it is indeed recommended to prefer the i/o of onboard raid 0 instead of the reliability and redundancy of a dedicated raid 6 setup.
I have a good question here. If you want to rebuild that array to a larger one. Can you rebuild it by failing one drive at a time and replacing it with a larger capacity drive. Then rebuilding the array after earch new drive replacement??
What system is this? IBM, HP, or Dell? That's massive!
Elelment5 2 months ago
hes got all his porn backed up on there
Jdwill1014 3 months ago
About as fun as watching paint dry
b2lee2 4 months ago
only 1GB/s?
I had 550MB from four 500GB SATA Barracuda drives. However, in mdadm RAID0.
RAID6 is very CPU-intensive. Go with RAID10, suppose to have higher write rates.
I've tested it on 12 drives, in best scenario 1/2 of them (six) can die, leaving data unaffected, depending on which will be dead. In the worst - only two.
As You can see there is rebuliding rate limit (200MB/s), can be check at:
/proc/sys/dev/raid/speed_limit_max
and
/proc/sys/dev/raid/speed_limit_min
You can change this.
TomTeneg 5 months ago
Dear TomTeneg,
1. RAID 10 : if the wrong 2 drives fail you loose all data. RAID6 doesn't have this risk.
2. What is more important for a home NAS: speed or storage capacity?
3. Your comment about rebuilding rate limiting is irrelevant as this limit is not reached.
Oh and,
"Only 1 GB/s?"
Come again?
louwrentius 5 months ago 16
@louwrentius Bet he never reached 1gbps on his consumer grade setup with fake raid, wish he told us something we didn't already know...
m4r71jn 4 months ago
@TomTeneg "RAID6 is very CPU-intensive" yeah duh... Thats why we use 500+ a pop dedicated raid controllers instead of those cheap ass fake onboard raid support you got 4 free with your consumer grade motherboard.
Go with raid 10 when you are poor and don't have the bucks to buy decent dedicated raid controllers.
m4r71jn 4 months ago
Him comparing raid 0 with raid 6 setups only in terms of speed is just plain moronic.
m4r71jn 4 months ago
@TomTeneg With regards to your own private porn library it is indeed recommended to prefer the i/o of onboard raid 0 instead of the reliability and redundancy of a dedicated raid 6 setup.
m4r71jn 4 months ago
Looks like it's about to fall off the desk. So much for data protection...
SLRist 6 months ago
Comment removed
nizedk 6 months ago
Looks good, give it another try using the "nmon" utility.
I think it gives a better visualization of what's happening with the disks.
I also like how you can "group" disks as a logical device.
loopie007 6 months ago
No wonder it failed there's a Apple sticker on the monitor ! lol just kidding nice setup
TylertheGeek28 6 months ago 19
Looks good :) what are the complete specs?
fackamato 7 months ago
Yes this is possible, but it will take about 20 times 5 hours = 100 hours excluding overhead. It will take weeks.
louwrentius 1 year ago
I have a good question here. If you want to rebuild that array to a larger one. Can you rebuild it by failing one drive at a time and replacing it with a larger capacity drive. Then rebuilding the array after earch new drive replacement??
syntaxerorr 1 year ago
5 hours..... 18 tb...raid 6.
20 drives.....gotta be 1 tb drives right? .9 capacity?
I'm thinking of building a raid 6 array.
2 fails at once baby!
syntaxerorr 1 year ago
Norco rpc-4020
louwrentius 1 year ago
What case is that in?
cferge 1 year ago
A rebuild takes about 5 hours, without any load.
louwrentius 1 year ago 8
NICE! Whats the rebuild time?
HunterGregorySr 1 year ago