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Topic starter
I received the following report this morning from SoftRAID [Email.png]:
- The disk disk4 has 2 i/o errors and should be replaced.
- The disk disk8 has 2 i/o errors and should be replaced.
Now, if I use SoftRAID, Disk Utility or DriveDX the two disks mentioned 4 and 8 are NOT part of my SoftRAID volume nor in the chassis (which is a 4 Bay Mercury Elite Pro). [SoftRAID.png]
Disk4 and Disk 8 are the same drive (it's been doing that for a long time showing up as 2 in SoftRAID but only as one of them in Disk Utility or DriveDX always the non-? disk number). [SoftRAID-2.png], [DriveDX.png]
The indicated drive is the Active Backup of the SoftRAID volume and one an hourly sync cycle with the Mac is running. DriveDX is not indicating any issues and I ran a Short Test on it and it passed.
I am running a Validation on the softRAID just to be sure of no issues there.
Is this something I should be concerned about?
Given the drive is a non-SoftRAID one I am inclined to ignore it for now and simply ensure that my cold storage and offsite backup is current with my SoftRAID JIC.
Thanks.
Regards,
Michael
Posted : 17/05/2026 8:27 pm
IO errors are indicators of an issue, but many things can cause them. Attach a SoftRAID tech support file and I can take a look for you.
Posted : 26/05/2026 2:27 pm
Topic starter
@softraid-support My apologies, I forgot to tick the subscribe button to get a notification on a reply.
I have generated a report today (hopefully its still useful).
I did get a second trigger of this on the same drive a day or so ago.
Thanks.
Regards,
Michael
Posted : 28/05/2026 1:00 am
I see the issue in part. The disk has a "core storage" volume on it, from an older MacOS version. MacOS has "deprecated" this and will stop supporting it in the future, so when you get a chance, erase it and start over. (I would backup, unmount the volume, zero disk with SoftRAID, the run Disk Utility and "erase" it as APFS or APFS encrypted. I don't think Apple will remove support in "MacOS 27" this fall, but it will at some point.
I do not see any IO errors in the SoftRAID log, either you did an uninstall SoftRAID, that removed the log entries, or the entries were not posted by SoftRAID.
I see there is no SMART data for your drives. Can you plug it into a Thunderbolt 4 port in the back? let me know if SoftRAID starts showing SMART data on it.
Posted : 28/05/2026 3:56 am
