Solid State Drives
Solid State Drives (SSD’s) are different than spinning platter hard drives (HDD’s)
and they are in wide use. New laptops are being marketed using the technology.
Although research began on flash memory in the 1950’s, SSD technology was
first introduced in the 1970’s and development continued throughout the years.
SSD’s were marketed in the 2000’s and the research continues.
There was some use of the technology before the 2000’s, but it was expensive.
An SSD is presented to the Operating System (OS) the same way that a spinning
platter hard drive is however, SSD’s use the same technology as SD cards, USB
drives, etc. SSD’s come in several form factors. The two most popular are; like a
regular drive that plugs into one of the hard drive slots and one that uses a PCie
expansion slot. SSD’s that use the PCie interface or their own interface, use a
technology called ‘NVme’ (Non-Volatile Memory Express) and are blazing fast.
It all depends on the controller that’s used. The controller is a processor that not
only tells your computer that it’s an SSD, it’s perhaps the most important part of
your SSD and every drive has a controller, regardless of the type of drive.
SSD’s have no moving parts and they are much faster than a HDD. A typical SSD
with a SATA interface (Serial Advanced Technology Attachment) is capable of
reading data 10 times faster than a HDD and it can write data 20 times faster.
However, if an SSD fails, data recovery could be challenging. A typical SSD that
has failed or become full, will usually become read only.
For this reason, you should leave some free space on any type of drive or its
write performance will slow down dramatically.
25% of the drive if we are talking about an SSD and, at least,15% for a HDD,
You shouldn't Defragment SSD’s like you do for spinning platter HDD’s.
SSD’s have a limited number of write sequences which, is actually controlled by
the number of erase sequences. There are often fewer writes and erases on
cheaper and older SSD drives. Defragmenting an SSD will result in many more
(unnecessary) writes and erases as your defragmenter moves the files around.
In Windows, I recommend using the format option and ‘quick erase.’
The quick erase option only erases the File Allocation Table (FAT).
The quick erase feature is usually the first option on a Windows PC.
If you use the format option, be sure to have a copy available of the Windows
operating system that you’re using.
On a Mac, I’m not sure because I’ve only erased the free space on a HDD and
an SSD won’t benefit from a free space erasure.
You won't see any speed improvements from defragmenting an SSD.
On a spinning platter drive, defragmenting is beneficial because the drives’ head
has to move over the magnetic platter to read the data, somewhat like a record
player. If a file's data is spread over the drive, the head will have to move around
to read all the pieces of the file, and this will undoubtedly take longer.
On older operating systems, the files that are deleted on your drive, aren't
actually deleted immediately. When you delete a file on your drive, the files are
only marked as deleted. Until the space is overwritten by another file, the data
could actually be recovered with file recovery software.
Linux kernel 2.6.28 and beyond, Mac OS X 10.6.8 and beyond and Windows 7
and beyond. Those operating systems support TRIM and you never need to
overwrite or ‘wipe’ the drive. In an OS that supports TRIM, the files are deleted
immediately. Not only was the TRIM command developed for SSD’s, it’s actually
good for them. The TRIM command is not an acronym.
Some old SSD’s don't support TRIM. However, TRIM was added shortly after
SSD’s were marketed. TRIM doesn’t always function with all devices and earlier
operating systems than those that are listed, don’t support TRIM.
Obliviously, a lot more information about the type of drive that you have can be
found on the internet.
© Corey Bailey Audio Engineering
DO IT YOURSELF?
BAKING AUDIO TAPE
LUBRICATING AUDIO TAPE
REPAIRING A BROKEN 78
FLATTENING A RECORD
A Little About Sound
Optimizing your PC
Packing Records for Shipment
People I have Known
Playing Records Wet
Playing a Wire Recording
Saving Your Family Video
The Ken Slater Tapes
Tubes vs Transistors
What Type of Wire?
Your Digital Data is at Risk