So when you do a full fsck on a hard drive to find bad blocks, does it ignore or exempt that space on the drive where it puts (reallocates) bad blocks into?
Ele ignora porque esse espaço não é endereçável de fora da unidade.
Então, quando você faz um fsck completo em um disco rígido para encontrar blocos defeituosos, ele ignora ou isenta esse espaço na unidade onde ele coloca (realoca) blocos ruins?
Estou falando sobre o espaço implícito pelos atributos SMART:
196 Reallocated_Event_Count
e
5 Reallocated_Sector_Ct .
A razão pela qual eu pergunto é porque quando eu corro:
# smartctl -a /dev/sda
Eu recebo a seguinte saída:
smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.2.0-40-generic] (local build)
Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net
=== START OF INFORMATION SECTION ===
Device Model: ST320LT007-9ZV142
Serial Number: W0Q7N7DH
LU WWN Device Id: 5 000c50 05dc9bc9e
Firmware Version: 0004LVM1
User Capacity: 320,072,933,376 bytes [320 GB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: 8
ATA Standard is: ATA-8-ACS revision 4
Local Time is: Thu Apr 11 23:02:21 2013 EDT
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x82) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Enabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 0) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: ( 63) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x303b) SCT Status supported.
SCT Error Recovery Control supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 10
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 114 099 034 Pre-fail Always - 70846592
3 Spin_Up_Time 0x0003 098 098 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 099 099 020 Old_age Always - 1442
5 Reallocated_Sector_Ct 0x0033 100 100 036 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 068 060 030 Pre-fail Always - 6535747
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 258518376513933
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 300
184 End-to-End_Error 0x0032 100 100 099 Old_age Always - 0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
188 Command_Timeout 0x0032 100 098 000 Old_age Always - 152
189 High_Fly_Writes 0x003a 100 100 000 Old_age Always - 0
190 Airflow_Temperature_Cel 0x0022 064 053 045 Old_age Always - 36 (Min/Max 36/38)
191 G-Sense_Error_Rate 0x0032 100 100 000 Old_age Always - 4
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 13
193 Load_Cycle_Count 0x0032 099 099 000 Old_age Always - 2977
194 Temperature_Celsius 0x0022 036 047 000 Old_age Always - 36 (0 15 0 0)
195 Hardware_ECC_Recovered 0x001a 057 054 000 Old_age Always - 70846592
196 Reallocated_Event_Count 0x000f 100 100 030 Pre-fail Always - 356 (31006, 0)
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0
250 Read_Error_Retry_Rate 0x0000 001 001 000 Old_age Offline - 18126
251 Unknown_Attribute 0x0000 001 001 000 Old_age Offline - 33297
252 Unknown_Attribute 0x0000 001 001 000 Old_age Offline - 14334
254 Free_Fall_Sensor 0x0032 100 100 000 Old_age Always - 0
SMART Error Log Version: 1
No Errors Logged
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Vendor (0x50) Completed without error 00% 1 -
SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.
O valor% do atributo 196 Reallocated_Event_Count me preocupa, e estou pensando em executar fsck on /dev/sda durante a noite para ver se realmente tenho blocos ruins.
Obrigado antecipadamente!
Tags hard-drive fsck smart linux ubuntu