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[PECET] anatomia padania ssd

To: pecet@man.lodz.pl
Subject: [PECET] anatomia padania ssd
From: Marcin Debowski <agatek@INVALID.zoho.com>
Date: Thu, 10 Nov 2022 06:59:39 GMT
Mam taki oto dysk:
Model Family:     Samsung based SSDs
Device Model:     Samsung SSD 860 EVO mSATA 250GB
Serial Number:    S41MNX0M412082W
LU WWN Device Id: 5 002538 e40f4e862
Firmware Version: RVT42B6Q
User Capacity:    250,059,350,016 bytes [250 GB]
Sector Size:      512 bytes logical/physical
Rotation Rate:    Solid State Device
Form Factor:      mSATA
TRIM Command:     Available, deterministic, zeroed
Device is:        In smartctl database [for details use: -P show]
ATA Version is:   ACS-4 T13/BSR INCITS 529 revision 5
SATA Version is:  SATA 3.1, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is:    Thu Nov 10 14:48:57 2022 +08
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  
WHEN_FAILED RAW_VALUE
  5 Reallocated_Sector_Ct   0x0033   058   058   010    Pre-fail  Always       
-       295
  9 Power_On_Hours          0x0032   094   094   000    Old_age   Always       
-       27242
 12 Power_Cycle_Count       0x0032   099   099   000    Old_age   Always       
-       27
177 Wear_Leveling_Count     0x0013   001   001   000    Pre-fail  Always       
-       2038
179 Used_Rsvd_Blk_Cnt_Tot   0x0013   058   058   010    Pre-fail  Always       
-       295
181 Program_Fail_Cnt_Total  0x0032   100   100   010    Old_age   Always       
-       0
182 Erase_Fail_Count_Total  0x0032   100   100   010    Old_age   Always       
-       0
183 Runtime_Bad_Block       0x0013   058   058   010    Pre-fail  Always       
-       295
187 Uncorrectable_Error_Cnt 0x0032   099   099   000    Old_age   Always       
-       5310
190 Airflow_Temperature_Cel 0x0032   035   027   000    Old_age   Always       
-       65
195 ECC_Error_Rate          0x001a   199   199   000    Old_age   Always       
-       5310
199 CRC_Error_Count         0x003e   100   100   000    Old_age   Always       
-       0
235 POR_Recovery_Count      0x0012   099   099   000    Old_age   Always       
-       20
241 Total_LBAs_Written      0x0032   097   097   000    Old_age   Always       
-       6830194150602

SMART Self-test log structure revision number 1
Num  Test_Description    Status                  Remaining  LifeTime(hours)  
LBA_of_first_error
# 1  Extended offline    Completed: read failure       90%     27237         
491744
# 2  Extended offline    Completed: read failure       90%     27236         
491744
# 3  Short offline       Completed: read failure       80%     27236         
491744
# 4  Short offline       Completed: read failure       80%     27236         
491744

Disk /dev/sda: 232.89 GiB, 250059350016 bytes, 488397168 sectors
Disk model: Samsung SSD 860 
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x46341ac6

Device     Boot     Start       End   Sectors   Size Id Type
/dev/sda1            2048   8390655   8388608     4G 82 Linux swap / Solaris
/dev/sda2  *      8390656 125045423 116654768  55.6G 83 Linux
/dev/sda3       125046784 488397167 363350384 173.3G 83 Linux

Widać, że swoje już odsłużył, pada, ale ciekawi mnie taka rzecz: 
Ostatnia partycja nie była w ogóle w użyciu, a teraz jak ją przemiatam 
badblockiem to równeż sypie błędami odczytu. Dlaczego?

-- 
Marcin

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