I have this old P4 box in my house with Ubuntu Server on it I use as a media server.
Apart from the IDE boot drive there is a 1TB SATA disk attached with one of those el-cheapo IDE to SATA adapters like this one.
The disk is supposed to be one of those 'GREEN' ones which I think spins at 5400RPM.
It worked not too shabbily for a while but now (it's about 70% full) but lately it started hiccuping when playing-back media files on my media renderer (although not always). Initially I thought it was my crappy WiFi playing up.
But then I run iostat and comes up with some weird numbers. (BTW these numbers are while Twonkymedia server is trying to index the disk)
Here are some typical results of iostat -dkx 2
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 2.00 0.00 0.00 100.00 Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sdb 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.99 0.00 0.00 99.50
... goes on and on like that ... then:
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sdb 0.00 0.00 0.50 0.00 64.00 0.00 256.00 1.58 206436.00 2000.00 100.00
Is the disk dying?
OK, so I run smartctl -a /dev/sdb and here are the results:
=== START OF INFORMATION SECTION === Device Model: WDC WD10EADS-00M2B0 Serial Number: WD-WCAV50522614 Firmware Version: 01.00A01 User Capacity: 1,000,204,886,016 bytes Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 8 ATA Standard is: Exact ATA specification draft version not indicated Local Time is: Sun Feb 7 07:43:21 2010 EST 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: (0x84) Offline data collection activity was suspended by an interrupting command from host. 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: (20760) 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: ( 2) minutes. Extended self-test routine recommended polling time: ( 239) minutes. Conveyance self-test routine recommended polling time: ( 5) minutes. SCT capabilities: (0x303f) SCT Status supported. SCT Feature Control supported. SCT Data Table supported. 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 0x002f 167 167 051 Pre-fail Always - 910436 3 Spin_Up_Time 0x0027 134 110 021 Pre-fail Always - 6283 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always - 158 5 Reallocated_Sector_Ct 0x0033 159 159 140 Pre-fail Always - 322 7 Seek_Error_Rate 0x002e 200 200 000 Old_age Always - 0 9 Power_On_Hours 0x0032 097 097 000 Old_age Always - 2625 10 Spin_Retry_Count 0x0032 100 100 000 Old_age Always - 0 11 Calibration_Retry_Count 0x0032 100 100 000 Old_age Always - 0 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 151 192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always - 34 193 Load_Cycle_Count 0x0032 176 176 000 Old_age Always - 72261 194 Temperature_Celsius 0x0022 112 088 000 Old_age Always - 35 196 Reallocated_Event_Count 0x0032 001 001 000 Old_age Always - 320 197 Current_Pending_Sector 0x0032 192 192 000 Old_age Always - 1388 198 Offline_Uncorrectable 0x0030 200 199 000 Old_age Offline - 22 199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always - 1 200 Multi_Zone_Error_Rate 0x0008 001 001 000 Old_age Offline - 125532 SMART Error Log Version: 1 No Errors Logged SMART Self-test log structure revision number 1 No self-tests have been logged. [To run self-tests, use: smartctl -t] 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.
I then run two tests, a short and a conveyance one. Here is the output:
=== START OF READ SMART DATA SECTION === SMART Self-test log structure revision number 1 Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error # 1 Conveyance offline Completed: read failure 90% 2625 1070661197 # 2 Short offline Completed: read failure 90% 2625 1070661197
OK, so, for those interested: the disk was dying.
First of all, since this was an old box and only has one SATA to IDE connection on it, I had to take out the disk and use my main desktop as the transfer machine between the SATA disks.
I tried to run gParted to copy the partition to the new disk. But by default it runs fsck before copying and was taking forever, and since it doesn't run with the -C option, after two hours, you couldn't tell where it was or what it was doing or how much longer it was going to take, so I cancelled it.
I then booted up with Ubuntu Desktop as a LiveCD, and ran fsck trying to clean up what I could before transferring data. It took, again, very long, but the progress bar gave me some assurance that it was progressing. Although at times it felt like thrashing the disk may have been doing more damage on the degraded disk than good.
When fsck finished, I tried to copy the files across in a single copy and that was also taking forever. I run iostat to check out the transfer rate and it turned out that it was averaging 40kB/s, with massive await times between 10,000ms and 60,000ms.
Two hours later, I let iostat running and then initiated multiple copy operations from the disk at the same time. That fared better, but not stellarly, now the average transfer rate was fluctuating between 100-600kB/s.
At this point it became clear that since I had to transfer around 800GBs of data it would take 10-20 days of operation to transfer.
I transferred the latest data only which took about 16 hours at which point the need for the server to be available again, (not to mention my main desktop) became larger than the need to recover all the data.
So I decided to put the new disk in the box, and, since the transfer speeds are so slow anyway, to hook-up the old disk to main desktop and try to transfer whatever other data I could manage over WiFi.
The problem now became my main desktop, as it is running Windows, so I installed Ext2FSD to try to access the data, but when hooking up the disk it refused to boot at all - froze after the CD check. Tried hot-plugging it while windows was running, but it also wasn't seeing it.
So at this point I'll wait for another machine with SATA connectors to become available that is not primarily needed for anything and then let it chug along trying to get whatever data it can, transfer it over the network before the disk becomes useless.
That's all, I thought I'd let everyone know for future reference.
I post the final status as an appendix to the question, instead of a response, in-order to give the tick to the first answer.
Thanks guys for the suggestions.