Next-Gen HAMR Platters Promise 80TB Hard Drives

Joined
Jun 4, 2010
Messages
4,953
The issue with increasing hdd storage size is access speeds.
I would say time taken to read/write the drive rather than access time.

I had a 650MB drive that could muster a "massive" 2.5MB/s average across the drive. In theory it would take 4.5 minutes from empty to full (assuming there was a secondary device fast enough to keep up). In practice I would be moving files from CDs on a 24x CD-ROM drive, so it was more like the 5-15 minute range depending on the number of files.

That's the slowest hard drive I've ever personally owned (excluding the likes of the 4x CD-ROM drive the computer came with, or floppy disks).

If we take an 18TB drive with an average of 200MB/s across the drive, you're looking at around 24 HOURS to fill the drive.
 

LaraC

Honorary Master
Joined
Mar 11, 2014
Messages
42,675
Drives this size will most likely be used in RAID or as backup drives. :)

Depending on the type of RAID you use it can improve data access speeds too.
 

TheMightyQuinn

Not amused...
Joined
Oct 6, 2010
Messages
31,961
80TB is still only theoretically possible, when looking at HAMR technology.

Eventually nice for archiving or long term storage, but the high density tech of HAMR, will not be conducive to fast writing OR retrieval.

And people want to store and retrieve data quickly nowadays...
 

Magnum

Executive Member
Joined
Mar 12, 2013
Messages
6,592
I would say time taken to read/write the drive rather than access time.

I had a 650MB drive that could muster a "massive" 2.5MB/s average across the drive. In theory it would take 4.5 minutes from empty to full (assuming there was a secondary device fast enough to keep up). In practice I would be moving files from CDs on a 24x CD-ROM drive, so it was more like the 5-15 minute range depending on the number of files.

That's the slowest hard drive I've ever personally owned (excluding the likes of the 4x CD-ROM drive the computer came with, or floppy disks).

If we take an 18TB drive with an average of 200MB/s across the drive, you're looking at around 24 HOURS to fill the drive.
Your math is off. Back then it took months to fill 13GB drive. Now you can fill 18TB in hours.
 
Joined
Jun 4, 2010
Messages
4,953
Your math is off. Back then it took months to fill 13GB drive. Now you can fill 18TB in hours.
How so?

2.5 MB/s * 60 = 150 MB per minute
150 MB/minute * 4.5 = 675 MB in 4.5 minutes

200 MB/s * 60 = 12,000 MB/minute
12,000 MB/minute * 60 = 720,000 MB/hour
720,000 MB/hour * 24 = 17,280,000 MB/day

The only performance data I can find for a 13 GB drive is the Western Digital WD136BA, at 8.2 MB/s. That would be...

8.2 MB/s * 60 = 492 MB/minute
492 MB/minute * 30 = 14,760 MB/30 minutes
 
Last edited:

Sinbad

Honorary Master
Joined
Jun 5, 2006
Messages
81,150
Imagine how long it will take to back this thing up or resilver it.
 

Magnum

Executive Member
Joined
Mar 12, 2013
Messages
6,592
How so?

2.5 MB/s * 60 = 150 MB per minute
150 MB/minute * 4.5 = 675 MB in 4.5 minutes

200 MB/s * 60 = 12,000 MB/minute
12,000 MB/minute * 60 = 720,000 MB/hour
720,000 MB/hour * 24 = 17,280,000 MB/day

The only performance data I can find for a 13 GB drive is the Western Digital WD136BA, at 8.2 MB/s. That would be...

8.2 MB/s * 60 = 492 MB/minute
492 MB/minute * 30 = 14,760 MB/30 minutes
There was no data that could fill a 13GB back then. Took me a year and I copied everything at every lan I could find. Coax was a PAIN!
 

Gnome

Executive Member
Joined
Sep 19, 2005
Messages
7,208
Drives this size will most likely be used in RAID or as backup drives. :)

Depending on the type of RAID you use it can improve data access speeds too.
Working for a huge company were we have tons of data centers and even more servers I can tell you right now that what you describe is very niche.

We built a storage platform that uses very slow access disks to store stuff for long term and abandoned it. It was more cost effective to stay with hard-disks that have realistic performance for a number of reasons.

There is a reasonable limit to read/write speed at which the product is too niche.

Maybe small businesses and some enterprises may use it, but cloud storage is where most new drives are begin shipped these days. If your drive doesn't cater well to that market, you market share diminishes quite rapidly.
 
Top