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How to use a SoftRAID startup volume with High Sierra

If you're using High Sierra, and booting up from a SoftRAID volume, you'll need to follow the steps given in this forum post, since the macOS High Sierra Installer does not recognize SoftRAID volumes as valid startup volumes.

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new Express 4M2 unusable with SoftRaid
#1
Before buying this enclosure I specifically asked OWC
if Samsung 970 Pro NvMe M2 would work ( those are not the cheapest SSD sticks )
Before connecting - there is a sticker on the cable socket ( not to be used )
Use with SoftRaid for best performance.
( i'm old Apple Raid user )
So yes - I install SOftRaid XT
( leaflet says SoftRaid - but lite version rejects enclosed code)


I initialize four 500 GB sticks ( 3 are directly / unformatted - I format one beforehand in AFPS just to test if the enclosure recognise it ) and create Striped ( RAID 0 ) volume
with 2 partitions 1 TB each .
All is good to start with - initially very good performance measured
(around 2000 MB / s ) ( empty )

Unfortunately - after first tries to copy stuff from my original disk
I get i/o error dialog from SoftRaid -
It says Disk 3 is failing.

After a verification process from SR - I get I/o errors on 2 disks now -
But the numbers of the disks are changed . ( like 5,6,7 )

After restart I get a finder Disk error as well.

Thank You for any suggestions .

2017 Imac / high Sierra -

OWC Express 4 M2 connected with T3 cable ( I have another T3 external drive in the chain - but Express comes first )
I cannot attach original
d.supt document created directly after problems occur - as it was exceeding 1MB limit.
So i made another document - this time it is under 1 MB but the forum tool says it is invalid type of attachment.
Reply
#2
Try to "certify" the SSD's. 3 passes. You can do all 4 at once. Do they pass certify?

The "failure" message is because the SSD hung and generated an error. SoftRAID generally considers any disk error a potential failure. Reliability should be 100%.

Let us know if you can certify the disks. (Certify does not use the SoftRAID driver)
Reply
#3
(07-21-2018, 01:39 PM)Jann Lipka Wrote: Before buying this enclosure I specifically asked OWC
if Samsung 970 Pro NvMe M2 would work ( those are not the cheapest SSD sticks )
Before connecting - there is a sticker on the cable socket ( not to be used )
Use with SoftRaid for best performance.
( i'm old Apple Raid user )
So yes - I install SOftRaid XT
( leaflet says SoftRaid - but lite version rejects enclosed code)


I initialize four 500 GB sticks ( 3 are directly / unformatted - I format one beforehand in AFPS just to test if the enclosure recognise it ) and create Striped ( RAID 0 ) volume
with 2 partitions 1 TB each .
All is good to start with - initially very good performance measured
(around 2000 MB / s ) ( empty )

Unfortunately - after first tries to copy stuff from my original disk
I get i/o error dialog from SoftRaid -
It says Disk 3 is failing.

After a verification process from SR - I get I/o errors on 2 disks now -
But the numbers of the disks are changed . ( like 5,6,7 )

After restart I get a finder Disk error as well.

Thank You for any suggestions .

2017 Imac / high Sierra -

OWC Express 4 M2 connected with T3 cable ( I have another T3 external drive in the chain - but Express comes first )
I cannot attach original
d.supt document created directly after problems occur - as it was exceeding 1MB limit.
So i made another document - this time it is under 1 MB but the forum tool says it is invalid type of attachment.
Reply
#4
Certify - alla disks passed
( just 4 dialog boxes )
i took almost 2 hours 3 passes 15 min . ( default )


Attached Files Thumbnail(s)
   
Reply
#5
Send the support file to support at SoftRAID dot com.

You cannot attach such files to the forum

BTW: Disk numbers in OS X are relatively random and will change frequently.
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