I had an idea for a new HDD with vastly improved speeds hopefully rivaling SATA/SAS 6Gb/s SSDs.
A normal hard drive is has inside a set of (about) 3.5"/2.5" disks for storage. You can increase the data rate by increasing RPM or density but the fastest hard drives can only transfer data at 200MB/s. My idea is to replace a 3.5" set of disks with 4 disks just shy of 1.8" (1.8" is just a few millimeters to wide for 4 sets to fit in a 3.5" casing) and RAID 0 them internally like done in SSDs.
Now each individual platter may only be capable of about 100-155MB/s (To my knowledge only 3.5" drives reach speeds much over 155MB/s) but put together they may saturate a SATA or SAS 6Gb/s connection. The capacity could still go very high and probably be similar to a regular 3.5" drive.
This drive should have a higher cost /GB than a normal HDD but lower /GB than an SDD while being the same speed as other SATA and SAS SSDs. It also wouldn't suffer the slower and damaging writes of an SSD. If given current technology this drive may hold up to about 3TB with 4 sets of 5 platters at a maximum about (my estimation) 150GB per platter.
The only serious problems I can think of are high power usage compared to a single standard drive,
probably having a higher failure rate than a normal HDD because of its MANY moving parts (4 sets of platters and heads should give it a failure rate of at least 4 hard drives),
The power usage of a 2.5" drive usually peaks around 7 watts with 3.5" drives being roughly double. I would expect this drive to use about double the 3.5" but in high data density computers such as data centers (one place I would expect such a drive to replace standard 3.5" drives easily) it would probably have somewhat higher capacity and much higher speeds than the standard 3.5" 10k and 15k drives (I'm unsure of if this drive could hit 15k easily but 10k seems very likely). The capacity, speed, and power usage should just about equal 4 2.5" drives while being in a 3.5" size
The chances of any 1 of the sets of platters to fail may be higher than a standard HDD but the chances each 1 failing should be equal to a single drive failing. Also with 4 sets of platters there can be some very dynamic controls, hopefully allowing the other 3 sets to continue function should one fail.
My thanks to those whom took the time to finish my gargantuan post, I spent a lot of time contemplating and writing it.
Are there any problems I have missed?
Does such a drive seem plausible?
A normal hard drive is has inside a set of (about) 3.5"/2.5" disks for storage. You can increase the data rate by increasing RPM or density but the fastest hard drives can only transfer data at 200MB/s. My idea is to replace a 3.5" set of disks with 4 disks just shy of 1.8" (1.8" is just a few millimeters to wide for 4 sets to fit in a 3.5" casing) and RAID 0 them internally like done in SSDs.
Now each individual platter may only be capable of about 100-155MB/s (To my knowledge only 3.5" drives reach speeds much over 155MB/s) but put together they may saturate a SATA or SAS 6Gb/s connection. The capacity could still go very high and probably be similar to a regular 3.5" drive.
This drive should have a higher cost /GB than a normal HDD but lower /GB than an SDD while being the same speed as other SATA and SAS SSDs. It also wouldn't suffer the slower and damaging writes of an SSD. If given current technology this drive may hold up to about 3TB with 4 sets of 5 platters at a maximum about (my estimation) 150GB per platter.
The only serious problems I can think of are high power usage compared to a single standard drive,
probably having a higher failure rate than a normal HDD because of its MANY moving parts (4 sets of platters and heads should give it a failure rate of at least 4 hard drives),
The power usage of a 2.5" drive usually peaks around 7 watts with 3.5" drives being roughly double. I would expect this drive to use about double the 3.5" but in high data density computers such as data centers (one place I would expect such a drive to replace standard 3.5" drives easily) it would probably have somewhat higher capacity and much higher speeds than the standard 3.5" 10k and 15k drives (I'm unsure of if this drive could hit 15k easily but 10k seems very likely). The capacity, speed, and power usage should just about equal 4 2.5" drives while being in a 3.5" size
The chances of any 1 of the sets of platters to fail may be higher than a standard HDD but the chances each 1 failing should be equal to a single drive failing. Also with 4 sets of platters there can be some very dynamic controls, hopefully allowing the other 3 sets to continue function should one fail.
My thanks to those whom took the time to finish my gargantuan post, I spent a lot of time contemplating and writing it.
Are there any problems I have missed?
Does such a drive seem plausible?