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An example is the use of flash cache modules (FCMs). Way 3: By chipsets external to the individual storage drives. Way 2: Combine SSD and HDD into a single hybrid volume by the computer’s operating system software, which provides an easier experience. Way 1: Manually places more frequently accessed data on the faster drive. In this way, the SSD in an SSHD is to act as a cache for the data stored on the HDD.Įach of the following way optimizes the overall performance of this kind of hard drive. Why does producers develop this kind of hard drive? The purpose is to improve performance by combining the higher-speed SSD to the cost-effective HDD with large storage capacity. In other words, this type of hard drive embraces a faster storage medium like SSD with a higher-capacity HDD. SSHD short for solid- state hybrid drive is a combination of the traditional hard drive and the new solid-state drive. With that part gone there is in most cases not enough left to enable recovery.If you want to upgrade your hard drive for a computer, the term SSHD will break into your life. However in a SSHD config your most-used files (and most of the folder-directly structure as that is frequently accessed too) will be on the SSD part (that is why you were using a SSHD in the first place). Only the ones on the bad disk and the ones straddling the disk-boundary would be lost. In a normal JBOD a lot of your files would be OK and recoverable.

In terms of data-loss this is WORSE than loosing a single disk in any other JBOD configuration. There is usually no graceful warning that would allow the SSHD controller to move data from the failed SSD part to the still good HD.Īnd technically speaking a SSHD is just a JBOD build from a SSD and a HD, with some smart software on top that decides which data is best put on the SSD part and which on the HD part. A classic HD might still be largely readable, except for the bad spots, but a SSD failure is usually 100% fatal causing 100% data-loss on the SSD. SSDs, when they fail, do so, in most cases, completely. It will simply die.Įxpect significant (even 100%) data-loss and the entire device being a loss. Pull the disk out and try to recover via another computer: Only garbage can be read or the disk refuses to work at all. I have seen about 15 broken SSHD drives in the last 3 years myself (and heard of maybe another 20 cases from colleagues) and they all failed in the same way: Computer crashed because the disk just stopped working.