Disk 1 only running at 3.0 Gbps others 6.0 Gbps

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Scott971
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Joined: Wed Sep 28, 2016 3:53 am

Disk 1 only running at 3.0 Gbps others 6.0 Gbps

Post by Scott971 » Mon Nov 28, 2016 3:38 am

Hi All,

Just wondering if anyone can shed some light on something that I have just spotted in that Disk 1 on my NAS is only running at 3.0 Gbps bus speed compared to all other disk running at 6.0 Gbps and it's evident in disk throughput performance as well.

So my set up is...

TS-853A running 4.2.2 2016/11/02 (latest firmware).

Disk 1 - 6 are RAID 10 and make up the storage pool all of them are WD RED 6 TB (WD60EFRX-68L0BN) disks running the same firmware 82.00A82 and were purchased at the same time.

Disk 7 -8 are Samsung 850 EVO 250GB SSD disks used for read / write acceleration.


If you look at the screen shot below from Qcenter throughput disk 1 has a lower throughput than all the other disks...

Orange graph line is disk 1 which is lower than all the other disks...

Image

If I take a look at the disk report you can see that disk 1 is running at 3.0 Gbps and not 6.0 Gbps like the rest of the disks...

Image

I have also verified this by querying /sys/class/ata_link/link1/sata_spd which shows 3.0 Gbps (all others are 6.0 Gbps).

I did also shutdown and re-seat disk 1 but still the same. Anyone have any thoughts or came across this before ?

Thanks in advanced !

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MrVideo
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Joined: Fri May 03, 2013 2:26 pm

Re: Disk 1 only running at 3.0 Gbps others 6.0 Gbps

Post by MrVideo » Mon Nov 28, 2016 10:30 am

Search the forum, you'll find other threads on this very topic.
QTS 4.1.n/4.2.n/4.3.n MANUAL
Submit QNAP Support Ticket - QNAP Tutorials, FAQs, Downloads, Wiki - Product Support Status - Moogle's QNAP FAQ help V2
When you ask a question, please include the following
(Thanks to Toxic17 for the links)
QNAP md_checker nasreport (release 20180525)
===============================
Model: TS-869L -- RAM: 3G -- FW: QTS 4.1.4 Build 20150522 (used for data storage)
WD60EFRX-68L0BN1(x1)/68MYMN1(x7) Red HDDs -- RAID6: 8x6TB -- Cold spare: 1x6TB
Entware
===============================
Model: TS-451A -- RAM: 2G -- FW: QTS 4.2.3 Build 20170213 (used as a video server)
WL3000GSA6472(x3) White label NAS HDDs -- RAID5: 3x3TB
Entware -- MyKodi 17.3 (default is Kodi 16)
===============================
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Scott971
Starting out
Posts: 17
Joined: Wed Sep 28, 2016 3:53 am

Re: Disk 1 only running at 3.0 Gbps others 6.0 Gbps

Post by Scott971 » Mon Nov 28, 2016 5:55 pm

I have looked at a number of threads on the forum but none of them seem to have an answer or resolution to this. I have logged a support ticket with QNAP support as well so I guess I will just have to wait and see what they come back with.

viewtopic.php?f=25&t=126047&p=576597&hilit=disk+1+3+gbps#p576597

viewtopic.php?f=182&t=116423&p=515584&hilit=gbps#p515584

viewtopic.php?f=142&t=100401&hilit=gbps&start=15

viewtopic.php?f=25&t=97713&p=434021&hilit=gbps#p434021

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