I had one of these drives inside my IBM PC 5150 XT. You used to have to park the heads before switching off. The PC lasted me 20 years and nothing ever went wrong. I got a 486 and decided to throw the 5150 off the top of a multi storey car park. Despite the dent, it survived. In the end I dumped the 5150 however I've kept the hard drive and still have it to this day, it's full of old dos games that I used to play.
Given the rather distinctive self-test (and the fact that it doesn't autopark), this is almost definitely the ST-225. First time I've ever seen one of them running while opened up - every other video that demonstrates this particular startup sound is using a closed drive.
MFM ;-) i tested mine with checkit... but there are also SCSI-versions, the one in the video is mfm, you can see that at 0:05, on the left side you see the interface
176,1kb/second
69,6 mb average seek
20,3 ms track seek
and i read something about 85 mb random seek (checkit just tells average seek and track seek, i found random seek value on a website)
Actually ST-225 disks can transfer up to 600 KB/s, and almost every oldie was spinning at 3600 rpm. And also, these were very common for a long time, since they are surprisingly reliable. I have two of two of them, both still working perfectly in my XT.
"With data density that low, a bit of dust really really won't hurt it much"
Actually, yes it would.
In operation, the heads literally float above the platters on a cushion of air. Dust can disrupt the airflow necessary to achieve this floating effect, causing a head crash that can damage the platters and possibly even the heads themselves.
I got one of these myself. It has a big sticker that says "XT" on it, and another that says "TYPE 2 20MB." I got another ST225 but it's a regular AT type 7 unit.
Interesting that two similar products would use two different BIOS drive types.
I have that! :D i love the sound of it when it loads, and its more reliable than my sound coil based 40 meg drive, which is broken, apparently.
macbookfan33 2 weeks ago
I have three of those st225s, one is in my 386 machine and runns windows 3.0
MrComputerfan 3 weeks ago
Touch it
szymusbananHD 3 months ago
My first hdd was a YE Data 17 meg job iirc running on a 12MHz 286.
Kachunk kachunk kachunk is how I would describe the soung the sterpper motor made. :)
CplNobbs 4 months ago
dare you to touch it!
connell256 5 months ago
struth mate, she's a ripper
mozaks80 5 months ago
BEEP BEEP BEEP BEEP BEEP BEEP BEEP BEEP! Welcome to Windows 1.01.
faxmanloveswaffles 6 months ago
Must've cost a fortune when it first came out. Now it's just for historical interest only.
GESSO217 8 months ago
Heh, wheres that accent from?
CSpannerz 10 months ago
Comment removed
HemaZev 1 year ago
that the old hard drive! how old are you?
agustinxDable 1 year ago
My Commodore 64 pwns yer HDD.
Teh1337Narb 1 year ago
I had one of these drives inside my IBM PC 5150 XT. You used to have to park the heads before switching off. The PC lasted me 20 years and nothing ever went wrong. I got a 486 and decided to throw the 5150 off the top of a multi storey car park. Despite the dent, it survived. In the end I dumped the 5150 however I've kept the hard drive and still have it to this day, it's full of old dos games that I used to play.
leerees 1 year ago
@leerees The XT was a 5160.
bobba84 9 months ago
WOW! 20Mb thats huge ! :P
trintin123 1 year ago
its like i get some of these thigs and download a 2GB game to a bank of them.
TIME REMAINING- INFINITY
cheetawolf 1 year ago
Too bad that you can't put modern hard disk on that thing.
IBM on 1TB.
Imagine.
BranislavDJ 1 year ago
Given the rather distinctive self-test (and the fact that it doesn't autopark), this is almost definitely the ST-225. First time I've ever seen one of them running while opened up - every other video that demonstrates this particular startup sound is using a closed drive.
Quietust 1 year ago
i found this old computer in a storage room at a school that has a st-251 in it and it works grate.
forresthop 1 year ago
ive got a 40 gb hard drive in my comp and its 2700 rpm huh pretty slow
hddr3 2 years ago
how does this conect to the computer is it ide?
alistairstuart2009 2 years ago
MFM ;-) i tested mine with checkit... but there are also SCSI-versions, the one in the video is mfm, you can see that at 0:05, on the left side you see the interface
176,1kb/second
69,6 mb average seek
20,3 ms track seek
and i read something about 85 mb random seek (checkit just tells average seek and track seek, i found random seek value on a website)
Messerschmitt262a2a 2 years ago
ooops i meant 85 MS random seek (not mb)
Messerschmitt262a2a 2 years ago
Actually ST-225 disks can transfer up to 600 KB/s, and almost every oldie was spinning at 3600 rpm. And also, these were very common for a long time, since they are surprisingly reliable. I have two of two of them, both still working perfectly in my XT.
willisxiii 2 years ago
Actually these ran at 3600 RPM.
vwestlife 2 years ago
i like the sound at 0:24
:P
cheetawolf 2 years ago 35
@cheetawolf i do to
the731272 1 year ago
With data density that low, a bit of dust really really won't hurt it much :P
produKtNZ 2 years ago 28
@produKtNZ yeah at 5mb per side of platter nothing much would harm it
the731272 1 year ago
This has been flagged as spam show
@produKtNZ
"With data density that low, a bit of dust really really won't hurt it much"
Actually, yes it would.
In operation, the heads literally float above the platters on a cushion of air. Dust can disrupt the airflow necessary to achieve this floating effect, causing a head crash that can damage the platters and possibly even the heads themselves.
Watcher3223 1 year ago
I got one of these myself. It has a big sticker that says "XT" on it, and another that says "TYPE 2 20MB." I got another ST225 but it's a regular AT type 7 unit.
Interesting that two similar products would use two different BIOS drive types.
Eep386 2 years ago
can you make a video of them? would be cool
Messerschmitt262a2a 2 years ago
what happens when you erase or corrupt the headpark program?
HEADCRASH CITY!!!
lol i couldnt resist saying that.
cheetawolf 2 years ago
I would say that is an st225n
an6500 2 years ago
100kb/s that's very slow but if you can make a hdtune test over it??
daand12 2 years ago
you must put the head in the park position! that drive cannot autopark! just push the head in the middle of the platter
Messerschmitt262a2a 2 years ago
ROFL!!! Ancient stuff! Hear it roar! My first HDD was 40 MB...
froz1983 2 years ago