External hard drive 1TB
Hello, I am running windows 7 64 on a laptop and have a 1TB external drive for backups. Recently the drive showed up in Disk manager as UNALLOCATED with know drive letter assigned to it. It also has a black colored bar and not blue so I cannot assign it a new drive letter. The drive will power on and spin and I have attempted to use the TestDisk freeware with no success. Is it possible to recover this data? If so is it possible with a freeware version ? If not freeware, what is the best product out there that's easy to use. Thanks.
Ran the HDDScan tool and can see the drive and everything on this report showed up as green except the 005 Reallocation Sector Count 100 100 0000000000-002D 005 and it has the yellow triangle symbol which indicates an issue.. Any suggestions on what to do next? I'm not the best on hard drive recovery issues.
HDDScan S.M.A.R.T. Report
Model: Hitachi HDS721010CLA332
Report By: HDDScan for Windows version 3.3
Report Date: 12/9/2012 12:44:35 PM
Num Attribute Name Value Worst Raw(hex) Threshold
001 Raw Read Error Rate 100 100 0000000000-0000 016
002 Throughput performance 133 133 0000000000-0069 054
003 Spin Up Time 130 130 0000030102-0143 024
004 Start/Stop Count 100 100 0000000000-0535 000
005 Reallocation Sector Count 100 100 0000000000-002D 005
007 Seek Error Rate 100 100 0000000000-0000 067
008 Seek time Perfomance 138 138 0000000000-001F 020
009 Power-On Hours Count 100 100 0000000000-1810 000
010 Spin Retry Count 100 100 0000000000-0000 060
012 Device Power Cycle Count 100 100 0000000000-0426 000
192 Emergency Retract Count 099 099 0000000000-054C 000
193 Load/unload Cycle Count 099 099 0000000000-054C 000
194 HDA Temperature 200 200 30 C 000
194 HDA Temperature Maximum 200 200 52 C 000
194 HDA Temperature Minimum 200 200 20 C 000
196 Reallocation Event Count 100 100 0000000000-002D 000
197 Current Pending Errors Count 100 100 0000000000-0000 000
198 Uncorrectable Errors Count 100 100 0000000000-0000 000
199 UltraDMA CRC Errors 200 200 0000000000-0000 000
The drive has 45 (= 0x2D) bad sectors, possibly more.
The "unallocated" message is telling you that the drive's partition information cannot be retrieved from sector 0.
If you try a surface scan using HDDScan, can you see the first section of the drive? You don't need to scan the entire drive.
I was able to successfully performed a Read\surface scan on 10% of the drive and then stopped it. I suppose this is good news since I did not have any bad\blue sectors show up in the output. Based on this information do you believe there is still a chance for recovery? If so? what's do you recommend as the next step.. If I have to purchase some recovery software that will be fine because I have to try everything possible to recover info. Thanks in advance!
When a drive has problems with sector 0, it is often a sign that there may be a more serious problem. However, in your case it appears that I was wrong and instead yours may be a simple logical fault, ie a damaged file system.
You could try data recovery software such as Partition Find and Mount. This tool will scan your drive looking for your missing partition(s) and then try to mount them. It doesn't repair your drive or write on it. If it is able to locate and display your file system, then the actually repair may be an easy one.
Partition Find and Mount:
Alternatively, you could examine the file system with a disc editor such as DMDE. You can search for your boot sectors by selecting Tools -> Search For Special Sector.
DMDE (DM Disk Editor and Data Recovery):
I used the Partition Find & Mount Utility to scan and find my external drive\partition. The program was successful in locating my partition and I was then able to use the mount feature to assign a new drive letter. I successfully recovered all of my data which included several hundred Cisco IOS files that I used in my GNS3 simulation and much more........
Thank you for all of the assistance, you are totally awesome and saved me a tremendous amount of painful recovery time.......