I/O errors on disks while trying to start up application, writes fail with "Data Protect" status

Issue

• when trying to start up application, getting the following I/O errors:

Jul 28 22:04:35 hostname kernel: sd 2:0:0:20: [sdap] CDB: Write(10): 2a 00 2f 9b e5 30 00 04 00 00
Jul 28 22:04:35 hostname kernel: end_request: critical space allocation error, dev sdap, sector 798745904
Jul 28 22:04:35 hostname kernel: sd 2:0:0:20: [sdap]  Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Jul 28 22:04:35 hostname kernel: sd 2:0:0:20: [sdap]  Sense Key : Data Protect [current]
Jul 28 22:04:35 hostname kernel: sd 2:0:0:20: [sdap]  Add. Sense: Space allocation failed write protect