M.2 SSD

[rudolf]

1.) If I want setup a M2.SSD for ADM-Volume (AS6604T), which size should it have for holding ADM ?

2.) The M2SSd Compatibility List defines the following classes:

I think this means ...
Consumer - means cheap price, low and average temperature and shock resistance ?
Gaming - high stream performance ?
Enterprise - high perf, high price,
Industrial - good temp and shock values
NAS - proposial for data volumes in RAID ? High blocked access ?

Please describe or show me where this classes are described.
I think for a volume in office I should use Consumer or Enterprise class ?

Thanks for response

[father.mande]

Hi,

In my AS6602T
2 x SSD Crucial CT500P5PSSD8 in Raid 1 as first volume for ADM and applications
... the basic ADM used less of 4 GB ... and up to ??? depends of added application BUT 500 Gb is large enough (including frequent used data)
2 x 1,5 To Hitachi HDD as second volume also in Raid 1 for data, image, video, etc.

No idea where classes are defined
... consumer is enough (just don't use green series if exist) for ADM throughput and perf. are enough ... but as cache high perf. is better
... industrial seem reserved for bad environment (ex. NAS inside a closed box) or high temp. or etc. so for a "normal" usage no need ...
... NAS is better for intensive Raid and 24/24 7/7 usage

I think Crucial are in consumer ... but in my lab run 24/24 7/7 (with application running so not in slepp without problem ...

Philippe.

[rudolf]

Thanks for your quick reply, then i use Samsung 970 EVO Plus M.2 NVMe SSD (MZ-V7S1T0BW) 1TB, will be enough for years ...
As HD I think seagate exos X18 is a good choice.
AS6604T as NAS

I think I will make higher backup freq and no RAID will be used (-> Single Mode)
If ADM is located on M2, do you see any problems if I change a data disk from time to time ?
(Means: replace one datadisk by another, but all datadisks are btrfs formatted at NAS)
Or better use myarchive for that ?

[father.mande]

Hi,

Pay attention ...
NAS (Asustor and other brand) format all disk inserted to be compliant with the ADM structure
So no switch possible INSIDE the NAs, but free to used external USB disk (or iscsi, cifs share, etc.), to change when you want. (I don't know if myarchive is formatted also ???)

Second point, EVEN you choice single ... it's in fact a Raid 1 with one disk
each disk have :
Part 1 system
Part 2 volume0 (ADM) in RAID 1
Part 3 swap in RAID 1
PArt 4 data in any RAID available for your model (0, 1, 1à, 5, etc.) ... in single it's a Raid1 with one disk

Philippe.

[rudolf]

So I see all internal disks formatted in btrfs or ext4 have spanning raid for adm, even they are used as a bunch of singles.
For adm i know (i.e QNAP) swapping disks would result in firmware problems (elder adm mixed with newer versions)

But I can't believe RAID1 with one disk in single mode, this would half capacity without any advantages ...

myarchive is a feature you can reserve a bay for a datadisk. you must format in NAS but in ntfs, btrfs and others.
myarchives can be swapped always and between different nas. if ntfs you can dock to your PC.
https://www.asustor.com/en/online/College_topic?topic=255
https://www.asustor.com/admv2?type=2&subject=9&sub=75

[father.mande]

Hi,

But I can't believe RAID1 with one disk in single mode, this would half capacity without any advantages ...

NO the disk is full (except the 3 reserved partitions) accessible ... it's NOT a Raid 1 between two partitions of a same disk ... it's a Raid 1 with a "missing" disk
hereafter an extract of /proc/mdstat

Code: Select all

md1 : active raid1 sda4[0]
      1460549632 blocks super 1.2 [1/1] [U]


I own only small NAS (2 bays) ... so I think ... I don't try or examine myarchive mechanism

Philippe.

[rudolf]

In opposite I will use M.2 and only myarchive, a feature missed at other NAS.

With big and high qualitative disks 24/7 I think Software RAID will be not a win.
Modern HD have enough internal Features to handle Common Errors (Except Electric Fails, but if your NAS has such error all data would be lost )
You see I am not a friend of RAID in SOHO, halving Lifetime and Capacity. In 24/7 industrial with hundreds of racks there is no other choice.

I want to run cyclic backups (only replace changed files) and if i have any problems swap datadisk with last backup.
Quicker than any rebuild.

The Feature of supporting Datadisk not formatted in NAS and giving ADM only a fixed place in internal USB or M.2 would be a real progress.
Why spread 'em between Data Storage in spanning RAID ... Vintage !

Rudolf