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USB Floppy Disk Striped RAID Under OS X (2004)

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Re: USB Floppy Disk Striped RAID Under OS X (2004)

#11
post #7

I thought about trying this with LTO drives, to have a ridiculously slow but also ridiculously high capacity raid, but sadly the LTO tape decks are a bit too expensive for this experiment.

U320 SCSI LTO-5 can be had cheap. Nobody wants them these days.

Yeah though that wouldn’t have a lot of storage, only 1.5 terabytes per tape. A new 2TB SSD is only about $100 and can easily be connected via usb.

Re: USB Floppy Disk Striped RAID Under OS X (2004)

#12
post #11

Earlier quoted context omitted.

U320 SCSI LTO-5 can be had cheap. Nobody wants them these days.

Yeah though that wouldn’t have a lot of storage, only 1.5 terabytes per tape. A new 2TB SSD is only about $100 and can easily be connected via usb.

Yeah but who knows if the data will be there in 10 years on the SSD? For tapes, it's about 20-30 years.

Re: USB Floppy Disk Striped RAID Under OS X (2004)

#13
post #6

I have done it with usb floppy drives under openbsd, I am sure it is just as trivial under linux but I had obsd and a bunch of usb floppy drives at my disposal. #it has been a few years I don't remember if it works with bare drives or if you need a disklabel on each floppy bioctl -c 5 -l /dev/sd2c,/dev/sd3c,/dev/sd4c softraid0 #the raid will show up now, check dmesg disklabel -E sd5 newfs /dev/sd5a mount /dev/sd5a /m…

> I love it when a system like this A. does not try to railroad you into the "correct path" and B. the independent layers actually work independently.

Yeah:)

> Unix was not designed to stop you from doing stupid things, because that would also stop you from doing clever things.

- Doug Gwyn

Re: USB Floppy Disk Striped RAID Under OS X (2004)

#14
post #11

Earlier quoted context omitted.

Yeah though that wouldn’t have a lot of storage, only 1.5 terabytes per tape. A new 2TB SSD is only about $100 and can easily be connected via usb.

Yeah but who knows if the data will be there in 10 years on the SSD? For tapes, it's about 20-30 years.

the tape may last 30 years. but do you really expect the tape drive to last that long, or, to even be able to get a tape drive that works in the future.

That was my big problem with the economics of tape. the drives are expensive and don't really last that long. At some scale factor tape makes sense, but it is larger than you would naively think.

As there is no good solution for personal scale long term archive type storage, I have sort of given up on it. Actual long term archives take the form of human readable printed documents. However this is very low density. so only the most important stuff. long term bulk storage is live, hard drives based arrays and backups, requiring an active maintainer it will die when I do, but no great loss, it is mostly junk anyhow.

Re: USB Floppy Disk Striped RAID Under OS X (2004)

#15
post #6

I have done it with usb floppy drives under openbsd, I am sure it is just as trivial under linux but I had obsd and a bunch of usb floppy drives at my disposal. #it has been a few years I don't remember if it works with bare drives or if you need a disklabel on each floppy bioctl -c 5 -l /dev/sd2c,/dev/sd3c,/dev/sd4c softraid0 #the raid will show up now, check dmesg disklabel -E sd5 newfs /dev/sd5a mount /dev/sd5a /m…

> I love it when a system like this A. does not try to railroad you into the "correct path" and B. the independent layers actually work independently.

Agree! My first thought while reading the article was that it would be very easy to do this on OpenBSD as well, either with USB floppies or normal 34-pin drives as well.

OpenBSD's softraid stack doesn't care much about what the underlying hardware is as long as it looks like a disk and talks like a disk.

Re: USB Floppy Disk Striped RAID Under OS X (2004)

#16

Not floppies but I clearly remember some Sun Microsystems video demonstrating ZFS where some guys dressed as over the top engineers randomly disconnecting USB thumb drives that were part of a pool to show the file system resilience.

Is that the same video where they shout at a hard disk?

Re: USB Floppy Disk Striped RAID Under OS X (2004)

#17
I love the "because I can" projects. There's another guy that made a whole music box from hundreds of floppies. Amazing. I love that kind of dedication.

One of my 'friends' is very capitalist and it makes him actually angry that people spend so much time on something that doesn't make money. I find it sad that he doesn't understand the concept of fun. And he has plenty of money.

Re: USB Floppy Disk Striped RAID Under OS X (2004)

#19
post #18

This feels like a storage solution that needs a "|0| days since last data loss" sign. Take the reliability of floppies under continuous read write cycles and divide it by 5?

The whole point is to avoid data loss, floppies are notoriously prone to failure, if you can do raid on floppy, you can survive loss of a disk.

Now if you are stripping... Well... then sure the data loss is your own fault, you have taken the R out of RAID.

Re: USB Floppy Disk Striped RAID Under OS X (2004)

#20
post #19
post #18

This feels like a storage solution that needs a "|0| days since last data loss" sign. Take the reliability of floppies under continuous read write cycles and divide it by 5?

The whole point is to avoid data loss, floppies are notoriously prone to failure, if you can do raid on floppy, you can survive loss of a disk. Now if you are stripping... Well... then sure the data loss is your own fault, you have taken the R out of RAID.

Right but as the title and post say, we are discussing striping.
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