I don't think Backblaze uses any of these so likely they've just pulled a stock photo of a hard drive from somewhere.
Not to mention that a device being solid state by definition precludes it from being a hard disk. Logically it just makes no sense to me.
shakes fist get off my lawn!
'sshd' is the reference command to the 'ssh daemon'.
To dknoll, SSHD for the Solid State Hybrid Disk, means that it has components of both drive systems, spinning platters and a functional amount of NAND for feequently used applications.
You could use it purely for it's SSD assuming the drive controller continues to function. Though that is a ridiculous proposal.
Which when regarded under the conventional drives at the time it was announced being primarily HDD's it makes it more clear.
You have an HDD that is a hybrid with solid state components. Logically clean cut, imo.
Hybrid disk would be the generic term.
There has been work on liquid-state storage.
So Solid State becomes the adjective modifier for providing the classification of the type of Hybrid Disk.
You could in theory have a Liquid State Hybrid Disk, or a Liquid Solid State Hybrid Drive.
"Can you bounce the SSHD?"