Just two ideas:
Simil RAID-4 or RAID-5 architecture within platters drive to improve reliability of entire drive.
When one sector of “simil array” did fails, it can be reallocated without data loss.
Pro: more reliability, more read speed, relatively simple implementation with minumum of 3 heads/2 platters.
Cons: more complexity firmware and processor/controller , less amount of data avalaible, less write speed performance.
Single arm with two “L-shaped” or “Y-Shaped” head to minimize access time.
When the requested sector is in the first half of the drive , data was readed from “sub-head 1” otherwise from “sub-head 2”.
Pro: half average access time, relatively simply firmware implementation.
Cons: more head complexity and weight, solve problem with head parking.
Thanks & Bye
also imitate RAID1
I’ve always thought that there should be a jumper on disks to div. the capacity
for single platter: write the same data on both sides of the platter
for two platter: write the same data on both platters
for the three & five platter oddballs: write the tops as one cylinder and the bottoms as the mirror cylinder
this could be used to support those with older OS which don’t go above 2TB
thus a new 3TB disk with “mirror” jumper would become a 1.5TB
and when they push 4TB disks add the jumper and voila a 2TB with internal data mirror
HDDs already remap bad sectors to a reserved area on the disk to keep it reliable.
Having a “simulated” RAID 1 on one drive isn’t going to help if the drive dies; all this would effectvely do is make half the disk a reserved area for bad sectors.
Additionally, this would double the cost since usable space would be halved. If you want RAID1, buy two disks.