Hi,
Sometimes ago I bought hetzner Finland server with SSD for around 30 euro because I can't resist :(
Anyway I have 2 Crucial_CT256MX100SSD1 with these 2 smart values
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 100 100 000 Pre-fail Always - 0 5 Reallocate_NAND_Blk_Cnt 0x0033 100 100 000 Pre-fail Always - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 25235 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 14 171 Program_Fail_Count 0x0032 100 100 000 Old_age Always - 0 172 Erase_Fail_Count 0x0032 100 100 000 Old_age Always - 0 173 Ave_Block-Erase_Count 0x0032 059 059 000 Old_age Always - 1256 174 Unexpect_Power_Loss_Ct 0x0032 100 100 000 Old_age Always - 6 180 Unused_Reserve_NAND_Blk 0x0033 000 000 000 Pre-fail Always - 2159 183 SATA_Interfac_Downshift 0x0032 100 100 000 Old_age Always - 0 184 Error_Correction_Count 0x0032 100 100 000 Old_age Always - 0 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 194 Temperature_Celsius 0x0022 067 044 000 Old_age Always - 33 (Min/Max 20/56) 196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 100 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 100 100 000 Old_age Always - 0 202 Percent_Lifetime_Used 0x0031 059 059 000 Pre-fail Offline - 41 206 Write_Error_Rate 0x000e 100 100 000 Old_age Always - 0 210 Success_RAIN_Recov_Cnt 0x0032 100 100 000 Old_age Always - 0 246 Total_Host_Sector_Write 0x0032 100 100 000 Old_age Always - 93537292190 247 Host_Program_Page_Count 0x0032 100 100 000 Old_age Always - 3021321009 248 Bckgnd_Program_Page_Cnt 0x0032 100 100 000 Old_age Always - 810663606
and the second one
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 100 100 000 Pre-fail Always - 0 5 Reallocate_NAND_Blk_Cnt 0x0033 100 100 000 Pre-fail Always - 0 9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 18609 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 14 171 Program_Fail_Count 0x0032 100 100 000 Old_age Always - 0 172 Erase_Fail_Count 0x0032 100 100 000 Old_age Always - 0 173 Ave_Block-Erase_Count 0x0032 087 087 000 Old_age Always - 390 174 Unexpect_Power_Loss_Ct 0x0032 100 100 000 Old_age Always - 5 180 Unused_Reserve_NAND_Blk 0x0033 000 000 000 Pre-fail Always - 2159 183 SATA_Interfac_Downshift 0x0032 100 100 000 Old_age Always - 0 184 Error_Correction_Count 0x0032 100 100 000 Old_age Always - 0 187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0 194 Temperature_Celsius 0x0022 067 046 000 Old_age Always - 33 (Min/Max 20/54) 196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0 197 Current_Pending_Sector 0x0032 100 100 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0030 100 100 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x0032 100 100 000 Old_age Always - 0 202 Percent_Lifetime_Used 0x0031 087 087 000 Pre-fail Offline - 13 206 Write_Error_Rate 0x000e 100 100 000 Old_age Always - 0 210 Success_RAIN_Recov_Cnt 0x0032 100 100 000 Old_age Always - 0 246 Total_Host_Sector_Write 0x0032 100 100 000 Old_age Always - 22511553499 247 Host_Program_Page_Count 0x0032 100 100 000 Old_age Always - 796718609 248 Bckgnd_Program_Page_Cnt 0x0032 100 100 000 Old_age Always - 1517302968
I use this server with RAID 1.
From power on hours perspective, I think they are pretty good. What makes me worried is 180 Unused_Reserve_NAND_Blk and 202 Percent_Lifetime_Used.
From some gogling, there is people that recommend to replace the disk if the value of Reallocate_NAND_Blk_Cnt or Unused_Reserve_NAND_Blk changed. Maybe I'm agree the disk need to be replaced if Reallocate_NAND_Blk_Cnt changed, but what about Unused_Reserve_NAND_Blk?
And then what does Percent_Lifetime_Used means? Is it really means that more close the value to 100, its lifetime is less?
The last question, how hetzner handle disk replacement? For example if I have these 2 disk with RAID 1 softraid, can they replace the disk without downtime? Maybe something like hotswap disk?