Parity was not found


Recommended Posts

Turned on Unraid just now & parity was not found

 

The Parity Disk was connected with a $17.50 Krysma 50cm / 0.5m Mini-SAS SFF-8087 to 4x SATA Adapter Cable

to LSI SAS 9201-8i 6GBs SCSI Card  ...  4 Disks are connected 

 

Shutdown & connected Unraid to a monitor & keyboard  then rebooted

LSI config showed  3 Disks connected  Parity Disk was missing

 

Shutdown & disconnected Parity Disk from LSI Card & connected it to a spare Motherboard Sata  .. Parity found & all is good

 

Would this be the cheap $17.50 Krysma Mini-SAS 4x SATA Cable - the wires are very thin & weak looking?

Edited by pokes
Link to comment
13 minutes ago, pokes said:

Could this "199UDMA CRC error count 7" be from swapping cables around?

Yes.

 

13 minutes ago, pokes said:

Anyway still trying to find how to make the spare disk into a Parity Disk

 or Dual Parity then replace the error Disk 

 

37 minutes ago, JorgeB said:

Stop array, assign spare to parity slot (or parity2), start array.

 

Link to comment
25 minutes ago, JorgeB said:

Stop array, assign spare to parity slot (or parity2), start array

Can't change spare to unassigned  .. only option is to change it no device & then assign to parity 2 

 but this greys out start array ( stopped invalid configuration)

Link to comment

A spare must be out of the Array, potentially out of the server altogether.

 

If needed, a spare will replace a disk of the Array, either a Data disk or a Parity disk.

If it is already part of the array, the replacement procedure will invalidate Parity at one part or the other of the process.

Link to comment

I'm a bit confused

 

I have 8 disks all 4TB

1 x disk is the Parity disk

1 x disk (No.1) is in Share A - (18% full)

5 x disks (No.'s 2-3-4-5-6) are in Share B - (57% full)

and 1 x disk (No.7) is unused & not needed for either Share.. is this disk part of the Array & can't be used except for a Share ?

 

Can't I stop array 

change the unused disk (No.7) to no device 

Tick the box "Start will disable the missing disk ..."

then disk (No.7) would be Dev 1 (spare) - assignable to what ever I wish

 

I think that I jumped the gun by making disk No.7 active & part of the array

It would have been Dev 1 if I had not ?

 

So as it's not being used for anything can't I just reverse it out ?

Edited by pokes
Link to comment
2 hours ago, pokes said:

Tick the box "Start will disable the missing disk ..."

then disk (No.7) would be Dev 1 (spare) - assignable to what ever I wish

Not without parity, and if you had parity and did that it would leave you with an unprotected array.

 

2 hours ago, pokes said:

So as it's not being used for anything can't I just reverse it out ?

You can remove it from the array:

5 hours ago, JorgeB said:

You can do a new config, assign that disk as parity and start array to begin the parity sync.

 

Link to comment

a.jpg.eb0add9fe9336dcc5a936234ed89afc6.jpg

These are the $17 cables - I had them looped, bunched together & cable tied, the wire in them is very thin & not very flexible  

No errors since last night when I took the sides off the case, cut the cable tie & freed them up

SMART short self-test: healthy

 

Would these $50 Startech cables be any better ?  - they look more like standard sata cables 

and a bit more insulated & forgiving, for when I put the sides back on the case

b.jpg.8e962601065fd1dbb078f6973fe46aee.jpg

Link to comment

StarTech Mini-SAS to SATA Cable, 1x SFF-8087 Plug, 4x SATA Female - 50 cm

The SAS8087S450 SFF-8087 to 4x SATA SAS cable features one 36-pin plug (SFF-8087), which fans out to four SATA 7-pin receptacles, providing a reliable solution for connecting up to four SATA HDDs to a SAS controller or backplane

 

The same type as the cheap $17.50 Krysma 50cm / 0.5m Mini-SAS SFF-8087 to 4x SATA Adapter Cable I'm using

Edited by pokes
Link to comment

 

On 4/17/2021 at 5:53 PM, uldise said:

These red ones, are not they reverse breakout?

You know they do look alike & don't seem to specify forward or reverse .. other than "one 36-pin plug .. fans out to four SATA"

 

I'm newish to Unraid so to avoid problems & to make things simple & more reliable .. as I had 2 more 4TB disks, I used 1 of them for Parity 2 & left that Disk No.7 for future data

completed 0 errors  Duration: 9 hours, 41 minutes, 18 seconds. Average speed: 114.7 MB/sec

Edited by pokes
Link to comment

The only problem I had during the several cable swaps & the hard drive install, was after I disconnected power when doing these

the date & time would go wonky mainly minus 12 hours & plus 20 years to 2041 etc ?

To get Unraid back up & running I had to connect a monitor & keyboard to boot

then "press F1 to run setup" & change date & time in bios save / exit

a new motherboard battery next time I open the case?

 

Edited by pokes
Link to comment

Lost Disk 4 on boot, it was connected to the Krysma's Mini-SAS No.2 sata cable

took side off - it was kinda squashed & bent down 

shut down - changed it to Krysma's (spare) No.1 sata cable (previously used for parity)

reboot - Disk 4 is Okay

 

I have the same Krysma Mini-SAS SFF-8087 ~ LSI SAS 9201-8i setup on a Raid 5 System with no problems

 

 

 

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.