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Old 13-12-2017, 06:18 AM   #7006
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would you guys populate a 4 bay nas with 8tb drives or a 8 bay nas with 4tb drives in raid 10?
That would depends on whether you want more IOPS at probably a higher cost having more drives and larger capacity enclosure. The 8-bay enclosure will cost more definitely, but for the same volume capacity, not sure more 4tb drives must be more expensive than half the number of 8tb drives though. More drives also mean more power consumption in this case.
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Old 13-12-2017, 06:26 AM   #7007
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That would depends on whether you want more IOPS at probably a higher cost having more drives and larger capacity enclosure. The 8-bay enclosure will cost more definitely, but for the same volume capacity, not sure more 4tb drives must be more expensive than half the number of 8tb drives though. More drives also mean more power consumption in this case.
also affects the rebuild time as well. it's really just a regular home nas for multimedia streaming.. maybe raid 10 is overkill performance but i'm more concerned about ure for raid 5.
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Old 13-12-2017, 10:29 AM   #7008
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also affects the rebuild time as well. it's really just a regular home nas for multimedia streaming.. maybe raid 10 is overkill performance but i'm more concerned about ure for raid 5.
Well yes it does, but so far there don’t seems to be any report of URE issues occurring during resilvering. At least have never seen any such reports in this forum. As for me, my usage of the NAS is for data preservation, so i use RAID6. Multimedia streaming does not require RAID10 since streaming is mostly a sequential read I/O.
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Old 13-12-2017, 11:20 AM   #7009
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Well yes it does, but so far there don’t seems to be any report of URE issues occurring during resilvering. At least have never seen any such reports in this forum. As for me, my usage of the NAS is for data preservation, so i use RAID6. Multimedia streaming does not require RAID10 since streaming is mostly a sequential read I/O.
i'm doing raid 10 purely for the speed of rebuild. if i'm taking the 8x4tb option i will definitely go for raid 6. 8tb seems like too big a gamble for raid 6. besides, raid 10 is infinitely better than raid 6 with 4 drives.
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Old 13-12-2017, 12:29 PM   #7010
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i'm doing raid 10 purely for the speed of rebuild. if i'm taking the 8x4tb option i will definitely go for raid 6. 8tb seems like too big a gamble for raid 6. besides, raid 10 is infinitely better than raid 6 with 4 drives.
Raid 10 redundancy is not 2 disks for all cases, but raid 6 is 2 disks redundancy for all cases. If your usage is mostly read, raid6 does it better than raid10. Not all Raid1 or Raid10 controllers does distributed read and write, you will need to benchmark it actually to be sure.

If you decided to go for more 4TB disks, that is fine, depends on your needs
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Old 13-12-2017, 05:32 PM   #7011
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Hello everyone, have a DS415+ that has been running as my office NAS for two years, populated with 2x 4tb Toshiba in SHR.

I'm running out of space, so I'm thinking if it's possible to add another 2x4tb Toshiba to expand the capacity by another 4tb?

Is it possible to add 2x8tb or is it not recommended?

I've seen the prices on Lazada and Hardware Clinic's Price List, but Lazada seems more ex.

Are there any shops that you will recommend Toshiba 4tb / HGST 8TB to buy from in SLS?

I think Toshiba is the most reliable, not too sure about HGST. Any thoughts?
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Old 13-12-2017, 06:17 PM   #7012
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Dynacore selling Toshiba 8TB HDD at $307.
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Old 13-12-2017, 07:13 PM   #7013
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since space is tight Im thinking of setting up only 2.5 hd NAS drive.
are there any that you guys can recommend ? ... thanks
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Old 13-12-2017, 07:35 PM   #7014
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Dynacore selling Toshiba 8TB HDD at $307.
Is it possible to run 2x 4tb, 2x8tb in SHR?

I'm just a noob, so just hope to plug and play haha.

Will there be redundancy?
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Old 13-12-2017, 07:39 PM   #7015
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Is it possible to run 2x 4tb, 2x8tb in SHR?

I'm just a noob, so just hope to plug and play haha.

Will there be redundancy?
https://www.synology.com/en-us/suppo...|8%20TB|8%20TB
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Old 13-12-2017, 07:41 PM   #7016
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Hello everyone, have a DS415+ that has been running as my office NAS for two years, populated with 2x 4tb Toshiba in SHR.

I'm running out of space, so I'm thinking if it's possible to add another 2x4tb Toshiba to expand the capacity by another 4tb?

Is it possible to add 2x8tb or is it not recommended?

I've seen the prices on Lazada and Hardware Clinic's Price List, but Lazada seems more ex.

Are there any shops that you will recommend Toshiba 4tb / HGST 8TB to buy from in SLS?

I think Toshiba is the most reliable, not too sure about HGST. Any thoughts?
yes, u can either add 2 x 4TB or 2 x 8TB.

1 big volume or 2 separate volumes are ok.


good choice on Toshiba drives unlike most carrots in here.
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Old 13-12-2017, 07:42 PM   #7017
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Is it possible to run 2x 4tb, 2x8tb in SHR?

I'm just a noob, so just hope to plug and play haha.

Will there be redundancy?
if both are on SHR and on 2 different volumes

then yes, 1 disk per volume.
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Old 13-12-2017, 08:56 PM   #7018
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Raid 10 redundancy is not 2 disks for all cases, but raid 6 is 2 disks redundancy for all cases. If your usage is mostly read, raid6 does it better than raid10. Not all Raid1 or Raid10 controllers does distributed read and write, you will need to benchmark it actually to be sure.

If you decided to go for more 4TB disks, that is fine, depends on your needs
like i said i don't really care about speeds as both will be more than necessary, more concerned about complete data loss while rebuilding raid6 with 8tb drives. anyone brave enough to do raid 6 on such large drives?
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Old 13-12-2017, 09:19 PM   #7019
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like i said i don't really care about speeds as both will be more than necessary, more concerned about complete data loss while rebuilding raid6 with 8tb drives. anyone brave enough to do raid 6 on such large drives?
If you care about URE during resilvering, you will wanna read these
https://forum.synology.com/enu/viewtopic.php?t=96171
https://www.reddit.com/r/zfs/comment...le_read_error/

True enough the probability of the URE is not a summmation across the size of the disk, it is per bit/sector/cluster. In the case of really you are so super luckily that when during one read across the other disks during resilvering that it fails, the resilvering really stop, in the case of RAID6 you still have have one more single disk failure before the whole array fails. You can always redo the resilvering process.

Last edited by davidktw; 13-12-2017 at 09:30 PM..
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Old 13-12-2017, 10:13 PM   #7020
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like i said i don't really care about speeds as both will be more than necessary, more concerned about complete data loss while rebuilding raid6 with 8tb drives. anyone brave enough to do raid 6 on such large drives?
i am brave enough. you want sponsor hdd?
Processor
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