With the recent floods in the United Kingdom, it is important to know that time can be a critical factor when trying to recover data from mechanical hard drives that have been submerged or damaged by water. Most mechanical hard drives have breather holes that may allow water to enter the hard drive enclosure if submerged. If this is the case then the longer the hard drive is left in this condition the worse the internal damage. Even if the hard drive is left to dry out, internally the damage has already been done. Our advice is not to try this if the data is critical to you or your business.
Any water damage hard drives that we receive go straight into our clean room environment to be dismantled and dried out internally. The hard drives external electronics would also require a cleaning process to prevent any electrical shorting caused by the water residue.
Although Solid Sate Hard Drives ( SSD ) do not have any mechanical moving parts, they are still prone to damage to the data chips and electronics by residue left by the water. Very much as mechanical hard drives they would require dismantling and specialist cleaning to ensure no electrical shorting of components.
Just recently we received a failed HTS543232L9SA0 out of a Macbook Pro. When we proceeded to carry out the initial diagnosis we noticed that the drive capacity was 160GB and not 320GB as the model number suggests. The Model number should have read HTS543216L9SA0. This particular hard drive has a black label which is different than most Hitachi drive labels of the same type. When we opened the drive in our clean room we found that the drive only had two heads compared to a 320GB which has four. When the drive is attached to our hardware or a PC it Identify’s correctly as a HTS543216L9SA0.
This immense 2TB iMac drive may be heavy, but have you ever wondered why?
When we recover these drives we often have to work on individual heads. As you can see from the image, this monster has 10 heads (the first is numbered zero). This means there are 5 spinning disks inside the drive.
From the outside, the only clue that these drives are so rammed full of disks is their weight. They are no bigger physically than any other desktop hard drive.
We see a lot of portable hard drives that don’t spin up when plugged into a USB port. All brands of hard drive can be effected including Hitachi, Western Digital and Seagate. The problem can be caused by power loss or sometimes due to mis-plugging of the USB lead. This causes the internal read heads to sit on the disc instead of parking on the ramp at the side.
The only way to overcome this problem is by taking the hard drive into our clean room to replace the damaged heads with good ones. This allows us to copy the data from the drive and store it on our server.
The repaired hard drives are not suitable to be reused after this sort of work as they will not work correctly, or fail after a very short time.
Western Digital want to buy Hitachi Global Storage. The FTC will only allow this if WD sell of some manufacturing capabilities to Toshiba. This seems to be due to some anti-competition type laws. The strange thing is that Toshiba don’t currently make 3.5″ drives, so perhaps we will see some strange Toshiba branded WD drives? Who knows.
Maybe it will be like when Maxtor were bought by Seagate and brought out the STMXXXXXXXXX drives, which were simply Maxtor branded Seagate drives.