Hi Marcis, The 5/24/0 sense key is a non-fatal informational message. It means there was an illegal request made due to an invalid field in the command descriptor block (CDB). The drive ignores this. I have observed it more frequently on non-certified drives though it also occasionally occurs (also non-fatally) on certified drives. For your information, in your report the physical disk designation "PD 05(e0x20/s5)" for example refers to physical disk 05 (PD 05) which is in enclosure 0x20 (which is the backplane) and slot 5 on that enclosure (s5). There is no way to mask the 5/24/0 sense keys, but I hope that is enough information to lay any concerns to rest.
Hi! Have found posts with similar problems, but they they don't seem to be the same case as this one.  System is Dell PowerEdge R510, with PERC H700. System is populated with ST3300657SS disks, four are from Dell and three from Seagate (same model, but non-certified by Dell). Latest firmware is used on H700, Dell certified-disks (rev. ES65) and on non-certified disks (rev. 0008, according to Seagate web site this is latest). Three non-certified drives were recently added and  "Unexpected Sense" errors started to appear in alertlog. Errors appear during server startup or when restarting" DSM SA Data Manger" service. Two types of "Unexpected Sense" errors appear (see attached alertlog for full alertlog): All errors have "Sense: 5/24/00" and severity "OK". Has anybody experienced similar problem? Is this something serious or these messages can be ignored (their severity is "OK" after all)? I'm concerned if it is safe to use these drives for production. Thanks! Non-certified drives (removed some irrelevant lines) Status                    : Non-CriticalState                     : OnlinePower Status              : Spun UpBus Protocol              : SASMedia                     : HDDDevice Life Remaining     : Not ApplicableFailure Predicted         : NoRevision                  : 0008Capacity                  : 278.88 GB (299439751168 bytes)Vendor ID                 : SEAGATEProduct ID                : ST3300657SS  Certified drives Status                    : OkState                     : OnlinePower Status              : Spun UpBus Protocol              : SASMedia                     : HDDDevice Life Remaining     : Not ApplicableFailure Predicted         : NoRevision                  : ES65Capacity                  : 278.88 GB (299439751168 bytes)Vendor ID                 : SEAGATEProduct ID                : ST3300657SSPart Number               : CN0F617N7262213F0DKTA01  Version Report---------------------Main System Chassis---------------------Name    : BIOSVersion : 1.10.2Name    : iDRAC6Version : 1.90.00 (Build 9)Name    : Lifecycle ControllerVersion : 1.5.0.671----------Software----------Name    : Microsoft Windows Server 2008 R2, Enterprise x64 EditionVersion : Version 6.1 (Build 7601 : Service Pack 1) (x64) Server Full InstallationName    : Dell Server AdministratorVersion : 7.1.0-----------------------------Storage Controller Firmware-----------------------------Name    : PERC H700 IntegratedVersion : 12.10.4-0001
"Unexpected Sense" errors on H700 during system boot