On 12/31/2011 12:21 PM, Tony van der Hoff wrote: > Well, Stan, I did. Unfortunately I didn't understand the reports, which > contain a plethora of information, for which I haven't been able to > locate an authoritative explanation, but seem to indicate that the > drives are OK:
/dev/sda > 1 Raw_Read_Error_Rate 243530983 > 7 Seek_Error_Rate 18363743 /dev/sdb > 1 Raw_Read_Error_Rate 138763088 > 7 Seek_Error_Rate 1374378 Interestingly, SMART says these two drives have been in service only 2.6 months: > 9 Power_On_Hours 1893 This indicates both drives are failing and should be replaced ASAP. Hi Seek_Error_Rate typically means the voice coil actuator assy is worn out. The arm has holes with sleeve bearings pressed into them which ride on a post screwed into the drive frame. The bearings wear over time, causing the actuator to wobble slightly on the post, eventually to a point past which the drive firmware can no longer compensate for the wobble. This causes the head to be misplaced over the platter. When this occurs you will see multiple head seek movements per read/write command. Thus, you should be seeing performance degradation as a result. Are you? Same parameters, 500GB WD Blue, in constant service for 2 years: 1 Raw_Read_Error_Rate 0 7 Seek_Error_Rate 0 9 Power_On_Hours 17934 It's difficult to believe drives less than 3 months old have worn out spindle bearings. That would indicate the vendor supplied bearings were not mic'd properly before installation, meaning horrible QC. Seagate isn't known for horrible QC. Is your system in a high vibration environment? Are these drives mounted securely in the chassis? If the cause of the problem is not bad QC at Seagate, it's likely high external vibration being transferred into the drive chassis. Either way, these two drives are toast and need replacement. If the problem in the latter, make sure you properly, securely, mount the replacement drives. -- Stan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/4eff94e6.6040...@hardwarefreak.com
