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Seagate Drive Support for 8TB disks
#1
Hello

I'm own a N7700PRO which currently spins seven 2TB drives. I want to replace those drives with two 8TB drives.
The device is only used as backup target for my main NAS (N10850). The two 8TB drives will be configured as JBOD store and act as emergency backup.

I plan to use the following drives:
Seagate ST8000AS0002 interne Festplatte 8000GB (8,9 cm (3,5 Zoll), 5900rpm, 128MB Cache, SATA lll)

Is this drive supported? I don't care about high write performance. I know the disk won't do more than avg. 50-90MB/s. Its an archive.
So does the N7700PRO support this drive? My firmware version currently is V5.03.02.8. Thanks.
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#2
Hello

I'm own a N7700PRO which currently spins seven 2TB drives. I want to replace those drives with two 8TB drives.
The device is only used as backup target for my main NAS (N10850). The two 8TB drives will be configured as JBOD store and act as emergency backup.

I plan to use the following drives:
Seagate ST8000AS0002 interne Festplatte 8000GB (8,9 cm (3,5 Zoll), 5900rpm, 128MB Cache, SATA lll)

Is this drive supported? I don't care about high write performance. I know the disk won't do more than avg. 50-90MB/s. Its an archive.
So does the N7700PRO support this drive? My firmware version currently is V5.03.02.8. Thanks.
Reply
#3
Dear Sir,

It is NOT recommended to use this HDD, and you could check form other NAS vander doesn't listed this HDD for RAID or JBOD volume too.
Yvon.
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#4
Dear Sir,

It is NOT recommended to use this HDD, and you could check form other NAS vander doesn't listed this HDD for RAID or JBOD volume too.
Yvon.
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#5
Its only for backup... so system is powered up, data copied and hopefully never seen again (only in case of data loss on main array).
PS: Does Thecus plan to support something like Raid over Filesystem, where disks are logically independant and can be plugged in another PC and data on it read?
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#6
Its only for backup... so system is powered up, data copied and hopefully never seen again (only in case of data loss on main array).
PS: Does Thecus plan to support something like Raid over Filesystem, where disks are logically independant and can be plugged in another PC and data on it read?
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#7
Dear Sir,

Current we focus on RAID on HDD mainly, thus we will forward your suggestion as possible.
Yvon.
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#8
Dear Sir,

Current we focus on RAID on HDD mainly, thus we will forward your suggestion as possible.
Yvon.
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#9
Would be kind of you. This concept would add huge value to Thecus Products (as it would be possible to free define level of protection / how many disks are used for parity).
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#10
Would be kind of you. This concept would add huge value to Thecus Products (as it would be possible to free define level of protection / how many disks are used for parity).
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#11
These archive drives work fine in the N7700PROv2, even in RAID6, however, rebuilds are painfully slow.
These work best when used in a write once read many situation, writes aren't actually that slow for small batches as the drives internal buffers and cache (~20GB) can mask the slow buffer to disk write speed.

That said Thecus devices and software are toys, if you're spending that much money on a stack of 8TB archive drives do yourself a favour and buy or build a better storage device... or if you're committed to the hardware you have then get rid of the Thecus software on one of the DOMs and load up FreeNAS or something more reliable.
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#12
Dear Sir,

It is SMR HDD not only Thecus but also other NAS vender unsupport this ST8000AS002 HDD, according from our test this HDD performance would drop to 0 under some condition, and make NAS assume this HDD out of RAID....
Yvon.
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#13
(10-26-2016, 12:36 PM)Thecus - Yvon Wrote: according from our test this HDD performance would drop to 0 under some condition, and make NAS assume this HDD out of RAID....

Could you please elaborate on what these "conditions" are... I have personally never seen a performance issue that I would attribute to the drives (especially not one that results in a drive or drives being dropped from the array), only with various components of the ThecusOS. ZFS support for example could be described as "performance drop to zero", iSCSI support isn't a whole lot better.

FYI I'm running two 7700PROv2s with 7 of these drives each in RAID6, so far the drives have almost 8000 "power on hours" and apart from a single early life failure (in the first week) these drives haven't skipped a beat being used as our home media server and backup servers.
Note: As previously mentioned I do not consider the sustained write speed to be an issue in our use case, rebuilds are painfully slow but we have a reliable online UPS system and in the event of a drive failure we are more likely to backup the system to other storage while its degraded than to let these unreliable NAS boxes attempt a rebuild.
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#14
Dear Sir,

We respect your decision. While HDD compatibility test we will test every RAID type rebuild, migration, expand and eles, but at first RAID rebuild stage will suffer HDDs lose easily, in short under heavy loading, critical condition and we will lose these HDD. If it is able to work on NAS reliable, we will more than happy to add on list to share with NAS user, and thanks for your understanding in advance.
Yvon.
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#15
(11-21-2016, 07:04 PM)Thecus - Yvon Wrote: Dear Sir,

We respect your decision. While HDD compatibility test we will test every RAID type rebuild, migration, expand and eles, but at first RAID rebuild stage will suffer HDDs lose easily, in short under heavy loading, critical condition and we will lose these HDD. If it is able to work on NAS reliable, we will more than happy to add on list to share with NAS user, and thanks for your understanding in advance.

I don't know what your definition of reliable is but we've been giving these disks hell and apparently they are just starting to hit 10,000 hours power on time.
Note: The of the workload on this machine is Write Once Read Many, backups, downloads, storage. One disk dropped out and caused a rebuild (there was no hardware fault with the drive, it just dropped out and then had to be readded to the RAID6 array)... it took some time but otherwise no issues.

Code:
2017-03-12 00:00:41
[N7700PROv2] : The Power_On_Hours of Disk 7 has reached 10021 hours. (ST8000AS0002-1NA17Z, Z8408???)
2017-03-12 00:00:41
[N7700PROv2] : The Power_On_Hours of Disk 5 has reached 10021 hours. (ST8000AS0002-1NA17Z, Z8408???)
2017-03-12 00:00:40
[N7700PROv2] : The Power_On_Hours of Disk 6 has reached 10021 hours. (ST8000AS0002-1NA17Z, Z8408???)
2017-03-12 00:00:39
[N7700PROv2] : The Power_On_Hours of Disk 4 has reached 10021 hours. (ST8000AS0002-1NA17Z, Z8408???)
2017-03-12 00:00:37
[N7700PROv2] : The Power_On_Hours of Disk 1 has reached 10021 hours. (ST8000AS0002-1NA17Z, Z8408???)
2017-03-12 00:00:36
[N7700PROv2] : The Power_On_Hours of Disk 2 has reached 10152 hours. (ST8000AS0002-1NA17Z, Z8408???)

The logs from the rebuild in case anyone is interested.


Code:
2017-02-09 07:35:07
[N7700PROv2] : Healthy: The RAID [RAID6] on system [N7700PROv2] s healthy now.
2017-02-09 07:34:09
[N7700PROv2] : The RAID [RAID6] on system [N7700PROv2] is recovering the RAID and rebuilding is in progress.
2017-02-09 07:34:09
[N7700PROv2] : Healthy: The RAID [RAID6] on system [N7700PROv2] is healthy now.
2017-02-08 23:02:00
[N7700PROv2] : User admin logged in from 192.168.x.x
2017-02-08 17:44:17
[N7700PROv2] : User admin logged in from 192.168.x.x
2017-02-08 13:19:31
[N7700PROv2] : User admin logged in from 192.168.x.x
2017-02-05 21:37:22
[N7700PROv2] : The RAID [RAID6] on system [N7700PROv2] is recovering the RAID and rebuilding is in progress.
2017-02-05 21:37:14
[N7700PROv2] : Disk 4 on [N7700PROv2] has been added.
2017-02-05 21:36:39
[N7700PROv2] : Disk 4 on [N7700PROv2] has been removed.
2017-02-05 21:15:26
[N7700PROv2] : User admin logged in from 192.168.x.x
2017-02-05 21:12:23
[N7700PROv2] : The RAID [RAID6] on system [N7700PROv2] change to degrade mode.
2017-02-05 21:12:22
[N7700PROv2] : Disk 4 on [N7700PROv2] has failed.
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