SMART Data & Reallocation counts (HITACHI)
Posted: October 26th, 2009, 15:35
Hi,
I am continuing to use Linux commands to test disks. I have a disk here that think is being affected by bad sectors. I have run smartctl -a and the following bits I am curious about:
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000f 100 100 046 Pre-fail Always - 146504
2 Throughput_Performance 0x0005 100 100 030 Pre-fail Offline - 27328512
3 Spin_Up_Time 0x0003 100 100 025 Pre-fail Always - 1
4 Start_Stop_Count 0x0032 099 099 000 Old_age Always - 3205
5 Reallocated_Sector_Ct 0x0033 100 100 024 Pre-fail Always - 8585639690241
7 Seek_Error_Rate 0x000f 100 100 047 Pre-fail Always - 3958
8 Seek_Time_Performance 0x0005 100 100 019 Pre-fail Offline - 0
9 Power_On_Seconds 0x0032 089 089 000 Old_age Always - 5747h+07m+11s
10 Spin_Retry_Count 0x0013 100 100 020 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 3019
192 Power-Off_Retract_Count 0x0032 099 099 000 Old_age Always - 270
193 Load_Cycle_Count 0x0032 097 097 000 Old_age Always - 64841
194 Temperature_Celsius 0x0022 100 100 000 Old_age Always - 22 (Lifetime Min/Max 12/59)
195 Hardware_ECC_Recovered 0x001a 100 100 000 Old_age Always - 3290
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 454492161
197 Current_Pending_Sector 0x0012 100 099 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0010 098 098 000 Old_age Offline - 5
199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x000f 100 100 060 Pre-fail Always - 15177
203 Run_Out_Cancel 0x0002 100 100 000 Old_age Always - 3732210646857
Lets see if I intrepret this right:
I see it has 5 Offline uncorrectable unreadable sectors
Reallocation Event Count 454492161 (The number of times it has tried to reeallocate sectors, which may not be the same as the actual number of reallocated sectors?)
Reallocated Sector Ct 8585639690241 (The actual number of reallocated sectors)
So this seems like quite a lot of reallocated sectors, but I guess its relative to drive size?
Is there a way to work out how many sectors a drive has for reallocation?
I assume that a few reallocated sectors is not a indicator of impending failure, but at what point should one become concerned?
Finally, I was very interested that this drive Passed the overall health self test?
Cheers in advance,
-Al
I am continuing to use Linux commands to test disks. I have a disk here that think is being affected by bad sectors. I have run smartctl -a and the following bits I am curious about:
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000f 100 100 046 Pre-fail Always - 146504
2 Throughput_Performance 0x0005 100 100 030 Pre-fail Offline - 27328512
3 Spin_Up_Time 0x0003 100 100 025 Pre-fail Always - 1
4 Start_Stop_Count 0x0032 099 099 000 Old_age Always - 3205
5 Reallocated_Sector_Ct 0x0033 100 100 024 Pre-fail Always - 8585639690241
7 Seek_Error_Rate 0x000f 100 100 047 Pre-fail Always - 3958
8 Seek_Time_Performance 0x0005 100 100 019 Pre-fail Offline - 0
9 Power_On_Seconds 0x0032 089 089 000 Old_age Always - 5747h+07m+11s
10 Spin_Retry_Count 0x0013 100 100 020 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 3019
192 Power-Off_Retract_Count 0x0032 099 099 000 Old_age Always - 270
193 Load_Cycle_Count 0x0032 097 097 000 Old_age Always - 64841
194 Temperature_Celsius 0x0022 100 100 000 Old_age Always - 22 (Lifetime Min/Max 12/59)
195 Hardware_ECC_Recovered 0x001a 100 100 000 Old_age Always - 3290
196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 454492161
197 Current_Pending_Sector 0x0012 100 099 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0010 098 098 000 Old_age Offline - 5
199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0
200 Multi_Zone_Error_Rate 0x000f 100 100 060 Pre-fail Always - 15177
203 Run_Out_Cancel 0x0002 100 100 000 Old_age Always - 3732210646857
Lets see if I intrepret this right:
I see it has 5 Offline uncorrectable unreadable sectors
Reallocation Event Count 454492161 (The number of times it has tried to reeallocate sectors, which may not be the same as the actual number of reallocated sectors?)
Reallocated Sector Ct 8585639690241 (The actual number of reallocated sectors)
So this seems like quite a lot of reallocated sectors, but I guess its relative to drive size?
Is there a way to work out how many sectors a drive has for reallocation?
I assume that a few reallocated sectors is not a indicator of impending failure, but at what point should one become concerned?
Finally, I was very interested that this drive Passed the overall health self test?
Cheers in advance,
-Al