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Re: Can I know if my disk is going bad.



Ryan Golhar wrote:
I usually watch the logwatch messages. Anytime I've had a disk go bad, there are usually kernel i/o errors pointed to /dev/sda (my hd).

Rohit khaladkar wrote:
Hi All,I am using Red Hat Linux 5.2 OS . I wanted to know if by any means there is a way to find out if my disk is going bad.I looked for some command
and found out "badblocks" command for the same.But the problem is this
command takes lot of time to execute.

Please let me know if anyone is aware of any other way of finding it out, if
the disk is going bad.

Thanks!
Rohit Khaladkar

You can use "smartctl" if the driver lets the SMART commands go to the disk.

This is the case for SATA but generally not SCSI.

1) Enable SMART (switches on online testing) and switch off auto offline testing (heavy data collection)

/usr/sbin/smartctl -son  /dev/hde
/usr/sbin/smartctl -ooff /dev/hde

2) Then run regular tests through a crontab entry:

00 06 * * * /usr/sbin/smartctl --test long /dev/hde > /dev/null
00 0-5,9-23 * * * /usr/sbin/smartctl --test short /dev/hde > /dev/null

3) Check the results using "smartctl -a /dev/hde"



smartctl version 5.33 [i686-redhat-linux-gnu] Copyright (C) 2002-4 Bruce Allen Home page is http://smartmontools.sourceforge.net/
=== START OF INFORMATION SECTION ===
Device Model:     WDC WD3200SB-01KMA0
Serial Number: WD-WCAMR3474349 Firmware Version: 08.05J08 User Capacity: 320,072,933,376 bytes
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is: 6 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Thu Oct 30 12:18:58 2008 CET 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: (0x05) Offline data collection activity was aborted by an interrupting command from host. Auto Offline Data Collection: Disabled. Self-test execution status: ( 241) Self-test routine in progress... 10% of test remaining. Total time to complete Offline data collection: (9000) 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. No General Purpose Logging support. Short self-test routine recommended polling time: ( 2) minutes. Extended self-test routine recommended polling time: ( 110) minutes. Conveyance self-test routine recommended polling time: ( 6) minutes.

SMART Attributes Data Structure revision number: 16
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 200 200 051 Pre-fail Always - 0 3 Spin_Up_Time 0x0003 189 187 021 Pre-fail Always - 5516 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 18 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 7 Seek_Error_Rate 0x000f 200 200 051 Pre-fail Always - 0 9 Power_On_Hours 0x0032 087 087 000 Old_age Always - 9911 10 Spin_Retry_Count 0x0013 100 253 051 Pre-fail Always - 0 11 Calibration_Retry_Count 0x0012 100 253 051 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 18 194 Temperature_Celsius 0x0022 118 099 000 Old_age Always - 32 196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always - 0 197 Current_Pending_Sector 0x0012 200 200 000 Old_age Always - 0 198 Offline_Uncorrectable 0x0010 200 200 000 Old_age Offline - 0 199 UDMA_CRC_Error_Count 0x003e 200 200 000 Old_age Always - 0 200 Multi_Zone_Error_Rate 0x0009 200 200 051 Pre-fail Offline - 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 Short offline Completed without error 00% 9910 - # 2 Short offline Completed without error 00% 9908 - # 3 Short offline Aborted by host 10% 9908 - # 4 Extended offline Completed without error 00% 9907 - # 5 Short offline Aborted by host 10% 9904 - # 6 Short offline Completed without error 00% 9902 - # 7 Short offline Aborted by host 10% 9902 - # 8 Short offline Aborted by host 10% 9901 - # 9 Short offline Completed without error 00% 9900 - #10 Short offline Completed without error 00% 9898 - #11 Short offline Completed without error 00% 9897 - #12 Short offline Completed without error 00% 9896 - #13 Short offline Aborted by host 10% 9896 - #14 Short offline Completed without error 00% 9894 - #15 Short offline Completed without error 00% 9893 - #16 Short offline Completed without error 00% 9893 - #17 Short offline Completed without error 00% 9892 - #18 Short offline Completed without error 00% 9890 - #19 Short offline Completed without error 00% 9890 - #20 Short offline Completed without error 00% 9888 - #21 Short offline Completed without error 00% 9887 -

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.








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