Haven’t hard drives been cheaper per storage amount than SSDs forever? The problem was always that they were slow. I think tape may still be cheaper per storage amount than hard drives, but the speed is abysmal.
It’s also used for sending huge amounts of data long distances. “Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway.” That’s usually attributed to Andrew S. Tanenbaum, but wikipedia follows that with “other alleged speakers include…” so take that with a grain of salt. They do note that the first problem in his book on computer networks asks students to calculate the throughput of a Saint Bernard carrying floppy disks.
Amazon is using trucks to ship hard drives for the largest data transfers. It’s more efficient than doing it over internet. They also offer a service where they will put the data you want in a drive, mail it to you, and after you’re done, you send the drive back.
It’s criminal that some computers are still sold with mechanical hard drives, but I will still be using them in NAS for years to come. The right technology for the right job.
That’s where I have a theory about when the hard drive market will collapse. A lot of networked drive setups have 4 drives on RAID 10. With SSDs, those can become 2 drive RAID1, and will be faster. That means SSDs can be 2x the cost to eliminate hard drives as a viable option for a very common use case.
That isn’t too far away. Your next NAS upgrade cycle might be with SSDs.
I don’t see it in the next upgrade cycle (2 - 5 years). My data needs on a NAS are creeping into 50TB and 100TB at several different installations and unfortunately growing. Gigabit ethernet is my bottleneck not disk i/o.
Are you trying to compile 1GB worth of code or load into memory 4GB of game at startup: absolutelly, they’re slow.
Are you serving a compressed 1080p video file from your NAS to your media player over 100Mb/s ethernet: they’re more than fast enough.
(Or to put things another way, trying to fit your home collection of media files on SSDs in yout NAS is probably not so smart as you can get almost 10x the storage for the same price and the bottleneck in that system isn’t the HDD)
You’re not going to put a massive production database of a performance criticial system on an HDD but storing “just in case” in one your historic of RAW images files after you’ve processed them is probably the smart thing to do.
So many HDs are crapping out after about 5 years. Not saying SSDs are better, but I haven’t used any for storage. But it’s starting to feel like a subscription plan as I’m rotating hard drives in my server nearly every year now since 2018.
That seems high. Data center drives have a failure rate around 1% per year, even for the worst manufacturer. Not sure how many drives you have or what your workload is like.
There’s some space occupied by the servo tracks (which align the heads to the tap) in LTO, but if we ignore that…
Current-generation LTO9 has 1035m of 12.65mm wide tape, for 18TB of storage. That’s approximately 13.1m², or just under 1.4TB/m².
A 90 minute audio cassette has around 90m of 6.4mm wide tape, or 0.576m². At the same density it could potentially hold 825GB.
DDS (which was data tape in a similar form factor) achieved 160GB in 2009, although there’s a lot more tape in one of those cartridges (153m).
Honestly, you’d be better off using the LTO. Because they’re single-reel cartridges (the 2nd is inside the drive), they can pack a lot more tape into the same volume.
Haven’t hard drives been cheaper per storage amount than SSDs forever? The problem was always that they were slow. I think tape may still be cheaper per storage amount than hard drives, but the speed is abysmal.
Edit: yeah looks like tape is 3x to 4x cheaper than hard drives https://corodata.com/tape-backups-still-used-today
Tape will be around until something better for archival purposes comes around
It lasts significantly longer sitting on the shelf than HDD or SSD by far
I doubt it’s being used for anything other than backups and archiving though
It’s also used for sending huge amounts of data long distances. “Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway.” That’s usually attributed to Andrew S. Tanenbaum, but wikipedia follows that with “other alleged speakers include…” so take that with a grain of salt. They do note that the first problem in his book on computer networks asks students to calculate the throughput of a Saint Bernard carrying floppy disks.
Do we assume the Saint Bernard is spherical and ignores air resistance?
No, it’s for real. The bandwidth of sending a truckload of disks to a destination can get to literally Tbps speeds. Latency is a different problem
Oh, I’m aware. Just making a tongue in cheek physics joke since they said he put that problem in a textbook.
Amazon is using trucks to ship hard drives for the largest data transfers. It’s more efficient than doing it over internet. They also offer a service where they will put the data you want in a drive, mail it to you, and after you’re done, you send the drive back.
https://aws.amazon.com/snowball/
Microsoft Azure Data Box Disk is also available.
https://learn.microsoft.com/en-us/azure/databox/data-box-disk-overview
It’s criminal that some computers are still sold with mechanical hard drives, but I will still be using them in NAS for years to come. The right technology for the right job.
I only use them in my NAS because I keep ending up with spare ones.
That’s where I have a theory about when the hard drive market will collapse. A lot of networked drive setups have 4 drives on RAID 10. With SSDs, those can become 2 drive RAID1, and will be faster. That means SSDs can be 2x the cost to eliminate hard drives as a viable option for a very common use case.
That isn’t too far away. Your next NAS upgrade cycle might be with SSDs.
I don’t see it in the next upgrade cycle (2 - 5 years). My data needs on a NAS are creeping into 50TB and 100TB at several different installations and unfortunately growing. Gigabit ethernet is my bottleneck not disk i/o.
Slow is relative.
Are you trying to compile 1GB worth of code or load into memory 4GB of game at startup: absolutelly, they’re slow.
Are you serving a compressed 1080p video file from your NAS to your media player over 100Mb/s ethernet: they’re more than fast enough. (Or to put things another way, trying to fit your home collection of media files on SSDs in yout NAS is probably not so smart as you can get almost 10x the storage for the same price and the bottleneck in that system isn’t the HDD)
You’re not going to put a massive production database of a performance criticial system on an HDD but storing “just in case” in one your historic of RAW images files after you’ve processed them is probably the smart thing to do.
For me, reliability is now the bottleneck.
So many HDs are crapping out after about 5 years. Not saying SSDs are better, but I haven’t used any for storage. But it’s starting to feel like a subscription plan as I’m rotating hard drives in my server nearly every year now since 2018.
That seems high. Data center drives have a failure rate around 1% per year, even for the worst manufacturer. Not sure how many drives you have or what your workload is like.
I’d love to see what could be done with current tape storage technology in standard compact cassette format.
There’s some space occupied by the servo tracks (which align the heads to the tap) in LTO, but if we ignore that…
Current-generation LTO9 has 1035m of 12.65mm wide tape, for 18TB of storage. That’s approximately 13.1m², or just under 1.4TB/m².
A 90 minute audio cassette has around 90m of 6.4mm wide tape, or 0.576m². At the same density it could potentially hold 825GB.
DDS (which was data tape in a similar form factor) achieved 160GB in 2009, although there’s a lot more tape in one of those cartridges (153m).
Honestly, you’d be better off using the LTO. Because they’re single-reel cartridges (the 2nd is inside the drive), they can pack a lot more tape into the same volume.
There’s not much price difference between SSDs and hard drives that are 1 TB or less. Larger than that, hard drives are still much cheaper.