About five years ago I acquired an Apple Tape Backup 40SC drive, an external SCSI drive from 1987 that matches the lovely design of Apple's CD-ROM and external hard drive offerings at the time. The tape drive can take DC2000/QIC-40/80 mini cartridge type tapes, which have a capacity of about 38.5 MB when formatted. It was designed to let you back up your entire Mac's hard drive (assuming you had a standard 20MB or 40MB drive of the time period). I bought it so I could create a video about it eventually.
My plans to make a video were halted when I realized the capstan (or "puck" as Apple's manual calls it) had become sticky and soft. The capstans in these drives all fail due to age, if you use the drive as-is, it usually will destroy your tapes by spreading the soft, sticky goo everywhere. (See "puck" in the diagram above). I opened the tape drive and spoke to @fogWraith about one day restoring it... so the drive went back on the shelf to sit for a few more years.
In early 2024 I snagged another drive off eBay, hoping it would be in better shape - but it wasn't. Then at VCF Midwest 2024 I picked up another tape drive... but it's capstan was even worse! Still in the back of my mind, I wanted to get it working one day. Scouring the web recently I only found many forum and Facebook posts from folks with the same problem. They all had Apple tape drives with sad capstans, all clamoring for the same solution, "We need the measurement of an intact capstan!"...
Fast forward to a few weeks ago, @MacEffects got a very neat haul of vintage Apple goodies asked me if I had a way to read some Apple 40SC tapes. He believed these tapes were made by a former Apple / Claris engineer. This got me thinking again, could I get one of my drives working and what's the safest way to backup these tapes?
There were three big problems I needed to solve:
1) Get a tape drive to work to read these tapes
2) Find out what format the tapes were in or what software made them
3) Figure out what was required to carefully wake these tapes from their slumber
Software for Apple's Tape Drive
Although Apple's 40SC drive came with it's own "Tape Backup 40SC" software (and is only compatible with System 6 or below), that wasn't the only game in town. Apple actually bundled copies of Dantz Retrospect at some point with their drive. However, there isn't a clear way to tell what format the tapes are in without popping them in a working drive.
I would later learn that Apple's own tool let you format the tape in two ways. Option 1, as if it were a hard drive - allowing read/write capabilities right from the Mac desktop!. Option 2, more like a traditional tape drive, where you can select data to write to the tape as a session, and return later to write more data to it.
Learning about drives and tapes:
I did some research about the format, but was quickly overwhelmed by the different tapes, formats and drives that used DC2000 / QIC style tapes. The tapes in question are QIC-40 mini cartridge tapes (or QIC-40 MC), this is important because there are many different sized QIC cartridges of the day. (See below for some size comparisons!)
I thought about acquiring another SCSI tape drive that could read the QIC-40 MC tapes... but it seems every Apple drive is toast and not many companies made QIC-40 style tape drives for the Mac (or that were SCSI). The closest match were tape drives made for MS-DOS / Windows. To cut costs those often connected through a floppy disk controller (FDC) port. Which makes sense, this format was seemingly aimed at consumers and not professionals, and for backing up a few megabytes of data that's one way to do it if you don't mind waiting.
The older, larger QIC cartridges (see photo below) have their own challenges, but the design is largely similar to the smaller ones. AJ of Forgotten Machines has a great website chronicling their QIC tape adventures on their website and YouTube channel. I sent off an email to AJ hoping for some advice, but didn't yet hear back, and later realized they specialize in the larger style tapes.
Left photo: A photo a larger style QIC (150MB) tape from fileformat.info, about 6 inches / 15.24 cm in length.
Right photo: A photo of my Apple QIC MC 40MB tape (sometimes called a mini data cartridge or micro cartridge) - a bit over 3 inches / 7.85 cm in length.
Luckily enough I had a few QIC-style tape drives in my collection already! Yayhoarding collecting! 
First up was a Colorado Jumbo 250, a Gateway branded Jumbo 1400 (which was oddly enough hiding inside a UMAX Mac Clone I picked up!) and a LaCie external Travan TR-1. Out of these drives it seems technically only the Jumbo 250 drive is the only one compatible to read QIC-40 or QIC-80 tapes. Usually tape drives are backwards compatible with one prior generation of tapes or formats, so a QIC-80 drive would usually be able to at least read QIC-40 tapes, etc. The tape standards are a bit confusing, but there's website here with more info on Qic.org.
My SuperMac J700 Macintosh clone had a PC-style tape drive (Jumbo 1400) installed by a previous owner, despite the fact that it wasn't compatible with any Mac I/O interface.
First Idea: Imaging QIC tapes via a Pentium PC
I looked inside my Colorado Jumbo 250 and 1400 drives and their capstans looked to be in good shape, and furthermore were easily accessible and more serviceable than Apple's tape drive, (more on that later). I had some new old stock blank QIC-100 tapes from the late 90's, they had a URL / email address printed on them, so they were at least from 1995 or later I'd imagine.
I had everything I needed to try my Jumbo 250 drive on my PC. After some trial and error, I got my drive connected to my NEC Pentium II box. With Windows 98 installed I fiddled with some DOS software, but nothing seemed to see the drive. Tape Mate II for DOS seemed promising, but when I tried it, it only wanted to see or connect to SCSI tape drives, and mine was a floppy-controller based drive.
Someone online mentioned Arcada backup, a nice GUI app for Windows. With that I was able to successfully configure the tape drive (it saw it as a QIC-80 drive) and test the new tapes by writing data to them, and restoring data from them. I was successful, so I had confirmation that my Jumbo 250 drive worked and my QIC-100 tapes were compatible! I also fiddled with my Jumbo 1400 drive, but since I saw reports it wasn't QIC-40/80 compatible, I stuck with the Colorado 250.
However, I knew the unique format of the Apple tapes likely couldn't be read by a Windows system... as that's not even possible for a standard Mac floppy or hard drive. But maybe Linux could help?
Linux waddling
I came across some helpful videos by CelGenStudios and Dmitry Brant and learned a lot about the QIC tape format. I'd highly recommend both of those videos, please check them out.
Dmitry's video showed him recovering tapes with a circa 2005 Linux distro, CentOS v3.5 (with kernel 2.4.21). This had to be specific because apparently tape drive support via Linux's ftape and zftape tools (ftape is for floppy disk controlled tape drives) were removed in Linux kernels. Thankfully the video seemed straight forward enough... but I wasn't a Linux expert and the video wasn't really a tutorial.
After some kind support by @GutBomb and some hints from @Action Retro I cautiously moved forward with Linux. After going down some rabbit holes I discovered Dmitry had a GitHub page, which documented their ftape instructions for CentOS 3.5 (and similar). Sadly that wasn't linked to their YouTube video at the time, but I'm very glad I stumbled upon it by pure luck!
Getting Linux installed on my old PCs was hindered by some questionable cheap SSDs I scored off eBay. It also didn't help that the CentOS install DVD .iso was long gone, so I had to burn three CD-Rs instead... yay disc swapping! A turtle's pace of an install (2-3 hours) should have been the clue, but not doing this before, I blamed the old CD drive. Slowness and solid hard drive activity lights aside, I was still struggling with the instructions on the GitHub page - as it assumed you knew some Linux things, which I clearly didn't.
At this point I realized the aging SSDs were the issue. I recalled I just got a newer SSD from Tom Barber at the recent VCF East Swap Meet, and I put that into an eMachines Celeron D system I tripped over in the basement. I think I picked this system up just for $10 or $15 purely for the stickers, the "QA / warranty void" sticker was still on the door too - so I hadn't even opened it yet. I'm glad I did as the thing was caked with dust inside, but after a good cleaning outdoors I put in the SSD and performed a CentOS 3.5 install. To my delight, instead of taking 3+ hours to install - it took only ~10 minutes!!
I love how silly this tower looks with the tan/brown tape drive installed!
After stumbling around a lot, I reached out to Dmitry but just by luck figured it out! You see, after following their steps, I needed to perform a `modprobe zftape` to start the services, then navigate to the `modules` directory and do an `sh insert_floppy` to run a script to do... stuff related to ftape/zftape and my tape drive. That seemed to do the trick. I'll write some detailed instructions later, but with this I was able to put in the tape I tested on my Windows 98 PC and dumped the data (via the dd command) via the Terminal. Success!
Since I was able to dump a PC tape via Linux, I assumed I could do the same with an Apple tape, because why would Linux care about the format? That would be something to explore for sure...
The capstan from my Apple 40SC Tape drive from VCF Midwest, yum!
Apple Drive Capstan
Since I didn't want to put all my eggs in one Linux-shaped basket, I continued tinkering with the Apple 40SC tape drive to see if I could find a solution for the capstan (or puck). The problem is, there is no record of what the size of this capstan should be!
The mechanism of my Jumbo drives differ so their capstan may not work with the Apple drive. At least the power supply in the external tape drive case seemed okay, so hopefully that wouldn't give me trouble.
Sadly the drive I had on my desk had a very sad capstan. It was very puffy and had turned to a sticky cork-like material (see photo above). Still, I carefully opened the case of the drive. Inside was the tape drive mechanism... sandwiched in by three circuit boards, plastic spacers, metal standoffs, a dozen screws and some delicate ribbon cables. SO FUN!
After carefully opening up the drive to reach the capstan I took some photos and measurements. I knew this wasn't an ideal candidate, the rubber or whatever material was all gone. I remembered I had gotten another Apple drive off eBay... and maybe had a third, but my basement search turned up empty... for now.
3D Printing Adventures
However, knowing the measurement of the bare metal capstan motor spoke, I now had a "too small" and a (rough) "too large" range I had to work with based on the open area in the Apple drive. In theory I could 3D print dozens of test capstans (or donuts as I joked with friends) to see if one would do the trick. After all, I had some test cartridges and an already broken drive. What's the worst that could happen?
The Apple drive capstan in tape drive #1 was almost bare metal, with a < 1mm ring of the sticky capstan remains around it. I measured its width (about 12.8-13 mm wide and 6.4mm tall) and gently pestered my pal @GutBomb intro creating a 3D printable capstan from my measurements via OnShape. The unknown variable was of course the width of the capstan that would make contact with the tape's own plastic capstan. I started with three sizes printed in PLA, 1mm, 1.4mm and 2mm in size.
Mmmm... revision A donuts!
The adventures continue in the post below...
My plans to make a video were halted when I realized the capstan (or "puck" as Apple's manual calls it) had become sticky and soft. The capstans in these drives all fail due to age, if you use the drive as-is, it usually will destroy your tapes by spreading the soft, sticky goo everywhere. (See "puck" in the diagram above). I opened the tape drive and spoke to @fogWraith about one day restoring it... so the drive went back on the shelf to sit for a few more years.
In early 2024 I snagged another drive off eBay, hoping it would be in better shape - but it wasn't. Then at VCF Midwest 2024 I picked up another tape drive... but it's capstan was even worse! Still in the back of my mind, I wanted to get it working one day. Scouring the web recently I only found many forum and Facebook posts from folks with the same problem. They all had Apple tape drives with sad capstans, all clamoring for the same solution, "We need the measurement of an intact capstan!"...
Fast forward to a few weeks ago, @MacEffects got a very neat haul of vintage Apple goodies asked me if I had a way to read some Apple 40SC tapes. He believed these tapes were made by a former Apple / Claris engineer. This got me thinking again, could I get one of my drives working and what's the safest way to backup these tapes?

There were three big problems I needed to solve:
1) Get a tape drive to work to read these tapes
2) Find out what format the tapes were in or what software made them
3) Figure out what was required to carefully wake these tapes from their slumber
Software for Apple's Tape Drive
Although Apple's 40SC drive came with it's own "Tape Backup 40SC" software (and is only compatible with System 6 or below), that wasn't the only game in town. Apple actually bundled copies of Dantz Retrospect at some point with their drive. However, there isn't a clear way to tell what format the tapes are in without popping them in a working drive.
I would later learn that Apple's own tool let you format the tape in two ways. Option 1, as if it were a hard drive - allowing read/write capabilities right from the Mac desktop!. Option 2, more like a traditional tape drive, where you can select data to write to the tape as a session, and return later to write more data to it.
Learning about drives and tapes:
I did some research about the format, but was quickly overwhelmed by the different tapes, formats and drives that used DC2000 / QIC style tapes. The tapes in question are QIC-40 mini cartridge tapes (or QIC-40 MC), this is important because there are many different sized QIC cartridges of the day. (See below for some size comparisons!)
I thought about acquiring another SCSI tape drive that could read the QIC-40 MC tapes... but it seems every Apple drive is toast and not many companies made QIC-40 style tape drives for the Mac (or that were SCSI). The closest match were tape drives made for MS-DOS / Windows. To cut costs those often connected through a floppy disk controller (FDC) port. Which makes sense, this format was seemingly aimed at consumers and not professionals, and for backing up a few megabytes of data that's one way to do it if you don't mind waiting.
The older, larger QIC cartridges (see photo below) have their own challenges, but the design is largely similar to the smaller ones. AJ of Forgotten Machines has a great website chronicling their QIC tape adventures on their website and YouTube channel. I sent off an email to AJ hoping for some advice, but didn't yet hear back, and later realized they specialize in the larger style tapes.
Left photo: A photo a larger style QIC (150MB) tape from fileformat.info, about 6 inches / 15.24 cm in length.
Right photo: A photo of my Apple QIC MC 40MB tape (sometimes called a mini data cartridge or micro cartridge) - a bit over 3 inches / 7.85 cm in length.
Luckily enough I had a few QIC-style tape drives in my collection already! Yay

First up was a Colorado Jumbo 250, a Gateway branded Jumbo 1400 (which was oddly enough hiding inside a UMAX Mac Clone I picked up!) and a LaCie external Travan TR-1. Out of these drives it seems technically only the Jumbo 250 drive is the only one compatible to read QIC-40 or QIC-80 tapes. Usually tape drives are backwards compatible with one prior generation of tapes or formats, so a QIC-80 drive would usually be able to at least read QIC-40 tapes, etc. The tape standards are a bit confusing, but there's website here with more info on Qic.org.
My SuperMac J700 Macintosh clone had a PC-style tape drive (Jumbo 1400) installed by a previous owner, despite the fact that it wasn't compatible with any Mac I/O interface.
First Idea: Imaging QIC tapes via a Pentium PC
I looked inside my Colorado Jumbo 250 and 1400 drives and their capstans looked to be in good shape, and furthermore were easily accessible and more serviceable than Apple's tape drive, (more on that later). I had some new old stock blank QIC-100 tapes from the late 90's, they had a URL / email address printed on them, so they were at least from 1995 or later I'd imagine.
I had everything I needed to try my Jumbo 250 drive on my PC. After some trial and error, I got my drive connected to my NEC Pentium II box. With Windows 98 installed I fiddled with some DOS software, but nothing seemed to see the drive. Tape Mate II for DOS seemed promising, but when I tried it, it only wanted to see or connect to SCSI tape drives, and mine was a floppy-controller based drive.
Someone online mentioned Arcada backup, a nice GUI app for Windows. With that I was able to successfully configure the tape drive (it saw it as a QIC-80 drive) and test the new tapes by writing data to them, and restoring data from them. I was successful, so I had confirmation that my Jumbo 250 drive worked and my QIC-100 tapes were compatible! I also fiddled with my Jumbo 1400 drive, but since I saw reports it wasn't QIC-40/80 compatible, I stuck with the Colorado 250.
However, I knew the unique format of the Apple tapes likely couldn't be read by a Windows system... as that's not even possible for a standard Mac floppy or hard drive. But maybe Linux could help?

Linux waddling
I came across some helpful videos by CelGenStudios and Dmitry Brant and learned a lot about the QIC tape format. I'd highly recommend both of those videos, please check them out.
Dmitry's video showed him recovering tapes with a circa 2005 Linux distro, CentOS v3.5 (with kernel 2.4.21). This had to be specific because apparently tape drive support via Linux's ftape and zftape tools (ftape is for floppy disk controlled tape drives) were removed in Linux kernels. Thankfully the video seemed straight forward enough... but I wasn't a Linux expert and the video wasn't really a tutorial.
After some kind support by @GutBomb and some hints from @Action Retro I cautiously moved forward with Linux. After going down some rabbit holes I discovered Dmitry had a GitHub page, which documented their ftape instructions for CentOS 3.5 (and similar). Sadly that wasn't linked to their YouTube video at the time, but I'm very glad I stumbled upon it by pure luck!
Getting Linux installed on my old PCs was hindered by some questionable cheap SSDs I scored off eBay. It also didn't help that the CentOS install DVD .iso was long gone, so I had to burn three CD-Rs instead... yay disc swapping! A turtle's pace of an install (2-3 hours) should have been the clue, but not doing this before, I blamed the old CD drive. Slowness and solid hard drive activity lights aside, I was still struggling with the instructions on the GitHub page - as it assumed you knew some Linux things, which I clearly didn't.
At this point I realized the aging SSDs were the issue. I recalled I just got a newer SSD from Tom Barber at the recent VCF East Swap Meet, and I put that into an eMachines Celeron D system I tripped over in the basement. I think I picked this system up just for $10 or $15 purely for the stickers, the "QA / warranty void" sticker was still on the door too - so I hadn't even opened it yet. I'm glad I did as the thing was caked with dust inside, but after a good cleaning outdoors I put in the SSD and performed a CentOS 3.5 install. To my delight, instead of taking 3+ hours to install - it took only ~10 minutes!!

I love how silly this tower looks with the tan/brown tape drive installed!
After stumbling around a lot, I reached out to Dmitry but just by luck figured it out! You see, after following their steps, I needed to perform a `modprobe zftape` to start the services, then navigate to the `modules` directory and do an `sh insert_floppy` to run a script to do... stuff related to ftape/zftape and my tape drive. That seemed to do the trick. I'll write some detailed instructions later, but with this I was able to put in the tape I tested on my Windows 98 PC and dumped the data (via the dd command) via the Terminal. Success!

Since I was able to dump a PC tape via Linux, I assumed I could do the same with an Apple tape, because why would Linux care about the format? That would be something to explore for sure...
The capstan from my Apple 40SC Tape drive from VCF Midwest, yum!
Apple Drive Capstan
Since I didn't want to put all my eggs in one Linux-shaped basket, I continued tinkering with the Apple 40SC tape drive to see if I could find a solution for the capstan (or puck). The problem is, there is no record of what the size of this capstan should be!
The mechanism of my Jumbo drives differ so their capstan may not work with the Apple drive. At least the power supply in the external tape drive case seemed okay, so hopefully that wouldn't give me trouble.
Sadly the drive I had on my desk had a very sad capstan. It was very puffy and had turned to a sticky cork-like material (see photo above). Still, I carefully opened the case of the drive. Inside was the tape drive mechanism... sandwiched in by three circuit boards, plastic spacers, metal standoffs, a dozen screws and some delicate ribbon cables. SO FUN!

After carefully opening up the drive to reach the capstan I took some photos and measurements. I knew this wasn't an ideal candidate, the rubber or whatever material was all gone. I remembered I had gotten another Apple drive off eBay... and maybe had a third, but my basement search turned up empty... for now.
3D Printing Adventures
However, knowing the measurement of the bare metal capstan motor spoke, I now had a "too small" and a (rough) "too large" range I had to work with based on the open area in the Apple drive. In theory I could 3D print dozens of test capstans (or donuts as I joked with friends) to see if one would do the trick. After all, I had some test cartridges and an already broken drive. What's the worst that could happen?

The Apple drive capstan in tape drive #1 was almost bare metal, with a < 1mm ring of the sticky capstan remains around it. I measured its width (about 12.8-13 mm wide and 6.4mm tall) and gently pestered my pal @GutBomb intro creating a 3D printable capstan from my measurements via OnShape. The unknown variable was of course the width of the capstan that would make contact with the tape's own plastic capstan. I started with three sizes printed in PLA, 1mm, 1.4mm and 2mm in size.
Mmmm... revision A donuts!

The adventures continue in the post below...
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