doubt about the size of Raid5
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doubt about the size of Raid5
hello everyone I have a doubt / problem, I have a 431p with 4 4tb disks configured in raid5 (3 + 1), having run out of space I bought a 453D with 4 6tb disks, I have configured everything updated the firmware and in the end I have tried to create the new raid5, it reads me the 4 disks with usable space each of about 5.75tb, I select 3 and it creates a raid with only 10.89tb (i.e. exactly the same size as the other nas with disks from 4tb), am I wrong something? is there a size limit? i searched on the internet but maybe i'm wrong the search terms, i hope you can help me
- Moogle Stiltzkin
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Re: doubt about the size of Raid5
https://www.servethehome.com/raid-calculator/
when you create a raid5 thick, by default only 50% is set to usable space. For the rest of the 50%, you have to change the allocation from 50% to 100% for the FULL usable space.
But normally people just change the allocation by little increments to as much as they currently require. And allot more over time when they more space. It wasn't advised to allocate 100% right away unless you need to (forgot the reason why).
So i'm wondering is that your issue? you did not know about the default 50% allocation when you first create the raid5 thick volume?
when you create a raid5 thick, by default only 50% is set to usable space. For the rest of the 50%, you have to change the allocation from 50% to 100% for the FULL usable space.
But normally people just change the allocation by little increments to as much as they currently require. And allot more over time when they more space. It wasn't advised to allocate 100% right away unless you need to (forgot the reason why).
So i'm wondering is that your issue? you did not know about the default 50% allocation when you first create the raid5 thick volume?
NAS
[Main Server] QNAP TS-877 (QTS) w. 4tb [ 3x HGST Deskstar NAS & 1x WD RED NAS ] EXT4 Raid5 & 2 x m.2 SATA Samsung 850 Evo raid1 +16gb ddr4 Crucial+ QWA-AC2600 wireless+QXP PCIE
[Backup] QNAP TS-653A (Truenas Core) w. 4x 2TB Samsung F3 (HD203WI) RaidZ1 ZFS + 8gb ddr3 Crucial
[^] QNAP TL-D400S 2x 4TB WD Red Nas (WD40EFRX) 2x 4TB Seagate Ironwolf, Raid5
[^] QNAP TS-509 Pro w. 4x 1TB WD RE3 (WD1002FBYS) EXT4 Raid5
[^] QNAP TS-253D (Truenas Scale)
[Mobile NAS] TBS-453DX w. 2x Crucial MX500 500gb EXT4 raid1
Network
Qotom Pfsense|100mbps FTTH | Win11, Ryzen 5600X Desktop (1x2tb Crucial P50 Plus M.2 SSD, 1x 8tb seagate Ironwolf,1x 4tb HGST Ultrastar 7K4000)
Resources
[Review] Moogle's QNAP experience
[Review] Moogle's TS-877 review
https://www.patreon.com/mooglestiltzkin
[Main Server] QNAP TS-877 (QTS) w. 4tb [ 3x HGST Deskstar NAS & 1x WD RED NAS ] EXT4 Raid5 & 2 x m.2 SATA Samsung 850 Evo raid1 +16gb ddr4 Crucial+ QWA-AC2600 wireless+QXP PCIE
[Backup] QNAP TS-653A (Truenas Core) w. 4x 2TB Samsung F3 (HD203WI) RaidZ1 ZFS + 8gb ddr3 Crucial
[^] QNAP TL-D400S 2x 4TB WD Red Nas (WD40EFRX) 2x 4TB Seagate Ironwolf, Raid5
[^] QNAP TS-509 Pro w. 4x 1TB WD RE3 (WD1002FBYS) EXT4 Raid5
[^] QNAP TS-253D (Truenas Scale)
[Mobile NAS] TBS-453DX w. 2x Crucial MX500 500gb EXT4 raid1
Network
Qotom Pfsense|100mbps FTTH | Win11, Ryzen 5600X Desktop (1x2tb Crucial P50 Plus M.2 SSD, 1x 8tb seagate Ironwolf,1x 4tb HGST Ultrastar 7K4000)
Resources
[Review] Moogle's QNAP experience
[Review] Moogle's TS-877 review
https://www.patreon.com/mooglestiltzkin
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Re: doubt about the size of Raid5
this is my situation, where i can choose to use all the space?
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Re: doubt about the size of Raid5
You need to select all 4 disks. The total capacity of the RAID 5 will then be 3 times that of 1 disk.
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Re: doubt about the size of Raid5
if i select all 4 disk i have a total of 16tb +/- and no security disk, i have the same situation as i wrote with a 431p but with 4 disk of 4tb each
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Re: doubt about the size of Raid5
looks like if there is a limit, the capacity of 4 hard disk by 4tb is the same of 4 disks of 6tb, when i create a raid 5 with 4 disk by 4tb( 3 disk + 1 security disk) i have 10tb of free space the same with 6tb disks
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Re: doubt about the size of Raid5
I'm not sure what you mean by security disk, I guess you mean spare disk?
RAID 5 with 3 x 4 TB disks + 1 x 4 TB spare disk = 8 TB (7.27 TiB) capacity
RAID 5 with 4 x 4 TB disks = 12 TB (10.9 TiB) capacity
RAID 5 with 3 x 6 TB disks + 1 x 6 TB spare disk = 12 TB (10.9 TiB) capacity
RAID 5 with 4 x 6 TB disks = 18 TB (16.37 TiB) capacity
As far as I know for your model the 16 TiB limit applies to the capacity of an individual volume, not to the capacity of the storage pool or RAID.
What was the estimated RAID capacity displayed in the volume creation "wizard" (lower right corner of the disks list) when you selected all 4 disks?
Or did you add the 4th disk after the RAID 5 was created?
RAID 5 with 3 x 4 TB disks + 1 x 4 TB spare disk = 8 TB (7.27 TiB) capacity
RAID 5 with 4 x 4 TB disks = 12 TB (10.9 TiB) capacity
RAID 5 with 3 x 6 TB disks + 1 x 6 TB spare disk = 12 TB (10.9 TiB) capacity
RAID 5 with 4 x 6 TB disks = 18 TB (16.37 TiB) capacity
As far as I know for your model the 16 TiB limit applies to the capacity of an individual volume, not to the capacity of the storage pool or RAID.
What was the estimated RAID capacity displayed in the volume creation "wizard" (lower right corner of the disks list) when you selected all 4 disks?
Or did you add the 4th disk after the RAID 5 was created?
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Re: doubt about the size of Raid5
)yes, pare disk, excuse me, i'm italian
the wizard show me exactly example that you report (RAID 5 with 3 x 6 TB disks + 1 x 6 TB spare disk = 12 TB (10.9 TiB) capacity or RAID 5 with 4 x 6 TB disks = 18 TB (16.37 TB capacity)
my question is: why 3x6tb+1 6tb that show wizard give me only 10.9tb and not 18tb+1 6 spare ?
the wizard show me exactly example that you report (RAID 5 with 3 x 6 TB disks + 1 x 6 TB spare disk = 12 TB (10.9 TiB) capacity or RAID 5 with 4 x 6 TB disks = 18 TB (16.37 TB capacity)
my question is: why 3x6tb+1 6tb that show wizard give me only 10.9tb and not 18tb+1 6 spare ?
- dolbyman
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Re: doubt about the size of Raid5
You should exchange those SMR drives ..bad purchase
16TB limit is only with CAT1 devices ..a 431p is a storage pool capable CAT2 and is not limited to on pools or static volumes
16TB limit is only with CAT1 devices ..a 431p is a storage pool capable CAT2 and is not limited to on pools or static volumes
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Re: doubt about the size of Raid5
no sorry in this case i was speaking of a ts-453D ( i have also a 431)
- dolbyman
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Re: doubt about the size of Raid5
same goes for that
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Re: doubt about the size of Raid5
than my problem is in wd red and not in qnap, right?
- dolbyman
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Re: doubt about the size of Raid5
they will become your problem when they go super slow and kick out of your raid
but that has nothing to do with capacity expansion
but that has nothing to do with capacity expansion
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Re: doubt about the size of Raid5
in 431 i have same wd red by 3 year and no problem (for now)
but have you any solution now for my capacity problem?
but have you any solution now for my capacity problem?
- dolbyman
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Re: doubt about the size of Raid5
wd introduced the smr disaster recently so your 3 year old disks probably do not use smr (google it)
post and english screenshot of your volume manager and the capacity expansion dialoge
post and english screenshot of your volume manager and the capacity expansion dialoge