Hi AGerasimov,  The errors you highlighted above indicate that the SDS is having issues writing to the disk while trying to initialize and add the disk. This is a new requirement/feature added in 2.0.1.3 code to make sure that slow disks are not added to the cluster. You can see the details here in the 2.0.1.3 release notes. Search for SCI-21795.  There is a time-out of 4.5 seconds given to the new disk to pass muster, so to speak. The beginning timestamp is 13:00:12.983359 and the ending where it times out is 13:00:17.446133, which is about 4.5 seconds. You can change the timeout value as stated in the release notes, but I would trust the error at this point.  If it worked when in RAID0 mode, but not in JBOD mode, then check with the card vendor to verify that something is not wrong with the config there.  Hope that helps
Hello. I have a strange error from SDS. I was trying ScaleIO 2.0.1.3 SDS on XenServer7 host. At first I have successfully added 240GB SSD to SDS and it was working fine, Then I have noticed that the disk was presented as RAID0 single disk, not as JBOD, so I removed it from SDS, changed it to JBOD (without rebooting the host) and was trying to introduce it again to ScaleIO, but received "SDS device IO error". I have tried to write/read to the disk directly from the host and had no errors at all. I restarted SDS - nothing, rebooted host - nothing. The disk is perfectly accessible from dom0. What could cause this error? 
Add SDS device IO error