Solved: External hard drive detected but not under my computer or disk management

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sarpedonides

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Mar 22, 2015
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I have had the same Toshiba external hard drive for years and have never had any problems plugging and using from any machine, mac or pc. I recently had to reformat my hard drives and re-install windows 7, and ever since I have been unable to access my external from this machine. It still works fine on my laptop, and when I plug it in to my tower, it still recognizes that "External USB 3.0" has been plugged in and downloads the drivers. However, the drive appears neither under my computer nor disk management, nor diskpart -> list volume. It does show up in my device manager as USB mass storage but uninstalling the drivers and plugging it back in does nothing. Is there anything I can try before moving all my files off and formatting the drive, and will that even help? Thanks for reading.
 

managed

Allan
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May 24, 2003
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15,076
What file system is the external hard drive using ? What OS is on the laptop that can still use the external HD ?
 

managed

Allan
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15,076
The Tower has the problem then. Does it (try to) install Usb 3.0 drivers every time you connect it to the Tower ?
 

sarpedonides

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Joined
Mar 22, 2015
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10
Nope, it installed it the first time successfully. If I uninstall the drivers and unplug/plug back in it just installs them again, no difference.
 

managed

Allan
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15,076
Ok, if there's nothing on it you still need connect it to the laptop and in Disk Management delete the partition(s) then make new partition(s) and format NTFS and see if it shows up on the Tower after that.
 

sarpedonides

Thread Starter
Joined
Mar 22, 2015
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I would have done that but this external is full of files and movies from the last few years that I don't want to lose and it's nearly full. I would transfer them onto my tower but can't do so with it not being detected. My laptop is only a 120gb SSD so that's not an option either. Any other suggestions? If not can you refer me to someone/somewhere who might be able to help me out?
 

sarpedonides

Thread Starter
Joined
Mar 22, 2015
Messages
10
This is what I get with diskcheckup on that drive:


*** DiskCheckup V3.3 Build: 1000 Report ***

SysInfo DLL Version: SysInfo v1.0 Build: 1090
Time of export: 18:15:00 29-Mar-2015

Device information:
Device ID: 3
Interface: USB
Device Capacity: 953867 MB
Serial Number: 23L5FC3TS
Model Number: TOSHIBA MQ01ABD100
Firmware Revision: AX001U
Partitions:
N/A

ATA information:

Disk geometry:
Cylinders: 121601
Tracks/Cylinder: 255
Sectors/Track: 63
Bytes/Sector: 512
Total disk sectors: 1953525168
Logical sector size: 512
Physical sector size: 4096
Media rotation rate: 5400 RPM
Buffer size: 8192 KB
ECC size: 0 Bytes

Standards compliance:
ATA8-ACS Supported: Yes
ATA/ATAPI-7 Supported: Yes
ATA/ATAPI-6 Supported: Yes
ATA/ATAPI-5 Supported: Yes
ATA/ATAPI-4 Supported: Yes
Serial/Parallel: Serial
SATA 3.0 Compilance: No
SATA 2.6 Compilance: Yes
SATA 2.5 Compilance: Yes
SATA II: Ext Compilance: Yes
SATA 1.0a Compilance: Yes
ATA8-AST Compilance: Yes
World Wide ID: 5000039496988F0F

Feature support:
SMART supported: Yes
SMART enabled: Yes
SMART self-test supported: Yes
SMART error log supported: Yes
LBA supported: Yes
IORDY supported: Yes
CFast supported: No
DMA supported: Yes
Maximum Multiword DMA mode supported: 2
Multiword DMA selected: None
Maximum UltraDMA mode supported: 5
UltraDMA selected: 4
Maximum PIO mode supported: 4
SATA Compliance: Yes
NCQ priority information supported: No
Unload while NCQ commands are outstanding supported: Yes
Phy Event Counters supported: Yes
Receipt of power management requests supported: Yes
NCQ feature set supported: Yes
SATA Gen2 Signaling Speed (3.0Gb/s) supported: Yes
SATA Gen1 Signaling Speed (1.5Gb/s) supported: Yes
Software Settings Preservation: Supported, Enabled
In-order data delivery: Not supported
Initiating power management: Supported, Disabled
DMA Setup auto-activation: Supported, Disabled
Non-zero buffer offsets: Not supported
Trusted Computing supported: No
Host Protected Area (HPA) supported: Yes
Read look-ahead supported: Yes
Read look-ahead enabled: Yes
Write cache supported: Yes
Write cache enabled: Yes
Power management supported: Yes
Security mode supported: Yes
Security mode enabled: No
Device Configuration Overlay (DCO) supported: Yes
48bit Addressing supported: Yes
Auto Acoustic Managment (AAM) supported: No
Power-up in Standby (PUIS) supported: No
Advanced Power Management (APM) supported: Yes
Advanced Power Management (APM) enabled: Yes
Current APM level: Minimum power consumption without Standby
CompactFlash Association (CFA) supported: No
General Purpose Logging (GPL) supported: Yes
Streaming supported: No
Media card pass through supported: No
Extended power conditions supported: No
Extended status reporting supported: No
Write-read-verify supported: No
Free-fall control supported: No
TRIM command supported: No
SCT command transport supported: Yes
NV Cache enabled: No
NV Cache Power Management supported: No

SMART ATTRIBUTES:
ID Description Status Value Worst Threshold Raw Value TEC
---------------------------------------------------------------------------------------------------------------------------------------------
1 Raw Read Error Rate OK 100 100 50 0 N.A.
2 Throughput Performance OK 100 100 50 0 N.A.
3 Spin Up Time OK 100 100 1 2636 N.A.
4 Start/Stop Count OK 100 100 0 1510 N.A.
5 Reallocated Sector Count OK 100 100 50 0 N.A.
7 Seek Error Rate OK 100 100 50 0 N.A.
8 Seek Time Performance OK 100 100 50 0 N.A.
9 Power On Time OK 83 83 0 7097 N.A.
10 Spin Retry Count OK 130 100 30 0 N.A.
12 Power Cycle Count OK 100 100 0 365 N.A.
191 G-sense Error Rate OK 100 100 0 3 N.A.
192 Power off Retract Count OK 100 100 0 38 N.A.
193 Load Cycle Count OK 100 100 0 3017 N.A.
194 Temperature OK 100 100 0 31 C N.A.
196 Reallocation Event Count OK 100 100 0 0 N.A.
197 Current Pending Sector Count OK 100 100 0 0 N.A.
198 Uncorrectable Sector Count OK 100 100 0 0 N.A.
199 UltraDMA CRC Error Count OK 200 253 0 0 N.A.
220 Disk shift OK 100 100 0 0 N.A.
222 Loaded hours OK 100 100 0 137 N.A.
223 Load/Unload retry count OK 100 100 0 0 N.A.
224 Load friction OK 100 100 0 0 N.A.
226 Load-in Time OK 100 100 0 193 N.A.
240 Head flying hours OK 100 100 1 0 N.A.

SMART HISTORY:
Attribute ID: 1 Attribute Name: Raw Read Error Rate
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 2 Attribute Name: Throughput Performance
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 3 Attribute Name: Spin Up Time
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 4 Attribute Name: Start/Stop Count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 5 Attribute Name: Reallocated Sector Count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 7 Attribute Name: Seek Error Rate
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 8 Attribute Name: Seek Time Performance
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 9 Attribute Name: Power On Time
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 10 Attribute Name: Spin Retry Count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 12 Attribute Name: Power Cycle Count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 191 Attribute Name: G-sense Error Rate
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 192 Attribute Name: Power off Retract Count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 193 Attribute Name: Load Cycle Count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 194 Attribute Name: Temperature
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 196 Attribute Name: Reallocation Event Count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 197 Attribute Name: Current Pending Sector Count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 198 Attribute Name: Uncorrectable Sector Count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 199 Attribute Name: UltraDMA CRC Error Count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 220 Attribute Name: Disk shift
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 222 Attribute Name: Loaded hours
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 223 Attribute Name: Load/Unload retry count
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 224 Attribute Name: Load friction
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 226 Attribute Name: Load-in Time
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history

Attribute ID: 240 Attribute Name: Head flying hours
Date Value Worst Raw
---------------------------------------------------------------------------------------------------------------------------------------------
No history


How do I check to see if my chipset is up to date? I just bought this mobo a few weeks ago and only installed the drivers off the disk it came with.
 
Joined
Dec 25, 2014
Messages
1,081
Did get more information from that. It all looks good really. To update the chipset drivers just go to the manufacturer's website and look for updates. The drivers on the disk are usually if not always out of date. I'd do the same for all your hardware. Please don't attempt to use 3rd party updaters as almost all of them will put viruses or adware on your machine.
 

sarpedonides

Thread Starter
Joined
Mar 22, 2015
Messages
10
I updated the chipset, restarted, uninstalled the drivers, unplugged, plugged it into a port in the back, drivers installed, and bam! It's all there. Thanks for the help, I was beginning to give up hope.
 
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