RE: Identifying vacuum tube module

I have some very similar (but not identical) tube modules in my IBM 519 Reproducing punch Mine are the same form factor, but the resistors are lengthwise. I'll attach the image which Kyle will get, but I doubt they will make it on to the list Bob Roswell brosw...@syssrc.com 410-771-5544

Re: PATA hard disks, anyone?

On Mon, 2018-03-26 at 11:18 -0700, Chuck Guzis via cctalk wrote: > I'm surprised that your sysadmin is allowing this to happen. Many large > outfits have a policy of sending any hard disk, regardless of content to > the industrial shredders. The advantages of working for a small company... the

Re: PATA hard disks, anyone?

On Mon, Mar 26, 2018 at 07:44:58PM +0200, Liam Proven via cctalk wrote: > On 26 March 2018 at 19:34, Tomasz Rola via cctalk > wrote: > > > > I have heard good things of MHDD diagnostic/repair program in the > > context of low level format and generally checking health of

Re: R: PATA hard disks, anyone?

On 03/26/2018 05:58 PM, Ali via cctalk wrote: >> NSA has been successful enough that the concept "DOD Wipe" as was found >> in programs like Gformat from Ghost no longer exists. > Bill, > > Are you saying that the NSA can recover data from a HDD that has been erased > and been written over

Compaq 9000 Series Rack Screws

Ok, A bit too new for this list but still hoping someone can help me out: I am in need of at least six (prefer 10) Compaq 9000 Series OEM Rack screws to mount a side panel. I believe these are M6 screws. On the side that had the panel already mounted the OEM screws are star screws approximately

Re: DTC 3250

On 03/26/2018 01:26 PM, Fred Cisin via cctalk wrote: > I just stumbled on a DTC3250, & "Installation Guide" > 8 bit ISA SCSI + 4 floppy > > Firmware: "GSH53A" > > The floppy interface MIGHT work for HD on a 5150/5160? > (with appropriate software) > > Condition unknown > > Anybody need one?

RE: R: PATA hard disks, anyone?

> NSA has been successful enough that the concept "DOD Wipe" as was found > in programs like Gformat from Ghost no longer exists. Bill, Are you saying that the NSA can recover data from a HDD that has been erased and been written over multiple times? -Ali

DTC 3250

I just stumbled on a DTC3250, & "Installation Guide" 8 bit ISA SCSI + 4 floppy Firmware: "GSH53A" The floppy interface MIGHT work for HD on a 5150/5160? (with appropriate software) Condition unknown Anybody need one? -- Grumpy Ol' Fred ci...@xenosoft.com

Re: RL02 Question

On 03/26/2018 04:08 PM, Aaron Jackson via cctalk wrote: >>> So, from what I can see, the drive should spin up correctly, but for >>> some reason it goes into fault mode. I am right in thinking that upon >>> load, the heads should continue moving forward until the first track is >>> found, right? I

Re: PATA hard disks, anyone?

Only somebody working for the NSA would bother trying to do that. Going from theory to practice can be VERY expensive and time consuming. -Original Message- From: Ethan via cctalk Sent: Monday, March 26, 2018 3:26 PM To: Chuck Guzis ; General Discussion: On-Topic and Off-Topic Posts

Re: R: PATA hard disks, anyone?

On 03/26/2018 04:09 PM, Fred Cisin via cctalk wrote: >>> Certainly, but it's fruitless to use logic in cases such as these. >>> Chances are that someone once read the paper from the 1990s that >>> said it >>> was possible to recover overwritten data from a drive using, IIRC, an >>> STM--at a

Re: R: PATA hard disks, anyone?

Certainly, but it's fruitless to use logic in cases such as these. Chances are that someone once read the paper from the 1990s that said it was possible to recover overwritten data from a drive using, IIRC, an STM--at a rate of what was it? 1 kbit per hour? On Mon, 26 Mar 2018, Ethan via cctalk

Re: R: PATA hard disks, anyone?

On 03/26/2018 12:26 PM, et...@757.org wrote: > AFAIK there has been a bounty out to recover data with a single wipe > that hasn't been collected. I thought it was all theory and never done > in practice? Here's the Gutmann paper that many people cite:

Re: RL02 Question

>> So, from what I can see, the drive should spin up correctly, but for >> some reason it goes into fault mode. I am right in thinking that upon >> load, the heads should continue moving forward until the first track is >> found, right? I should not have to perform a seek manually from the PDP? >>

Re: RL02 Question

> > So, from what I can see, the drive should spin up correctly, but for > some reason it goes into fault mode. I am right in thinking that upon > load, the heads should continue moving forward until the first track is > found, right? I should not have to perform a seek manually from the PDP? >

Re: R: PATA hard disks, anyone?

Certainly, but it's fruitless to use logic in cases such as these. Chances are that someone once read the paper from the 1990s that said it was possible to recover overwritten data from a drive using, IIRC, an STM--at a rate of what was it? 1 kbit per hour? AFAIK there has been a bounty out to

Re: RL02 Question

I have turned up the amplitude just a little higher than I think it should be. Instead of going into fault mode after loading a pack, the READY light flashes about quickly. With the scope hooked up I can see that it hasn't managed to find the first track yet. Not really sure what it thinks it is

Re: R: PATA hard disks, anyone?

On 03/26/2018 11:23 AM, Mazzini Alessandro wrote: > Well, but with dban and/or other certified software the drives are as well as > new. The only issue would be the time/cost to sanitize them in house. Certainly, but it's fruitless to use logic in cases such as these. Chances are that someone

Re: RL02 Question

Hi Andrea, Thanks for your suggestions. Checking the amplified output from the r/w heads is one of the first things I did. The voltages are within normal range, but only after I push the head a bit further into the pack. Although, I did not set the jumper to try the other head (I suppose I was

Re: SGI Indy power supply: identify this diode?

4B would be a 2.2V zener; 4A would be a 2.0V zener, so that’s odd indeed... Camiel On 3/24/18, 9:47 PM, "cctech on behalf of Pete Turnbull via cctech" wrote: After a recent power cut and a series of glitches as the power

R: PATA hard disks, anyone?

Well, but with dban and/or other certified software the drives are as well as new. The only issue would be the time/cost to sanitize them in house. -Messaggio originale- Da: cctalk [mailto:cctalk-boun...@classiccmp.org] Per conto di Chuck Guzis via cctalk Inviato: lunedì 26 marzo 2018

Re: RL02 Question

Hello, I'm not an absolute expert, but I successfully fixed a couple of RL02 in the past. Adjustment to the head is only useful for azimuth, I think. The radial position will be adjusted continuously using the servo tracks, so there's no absolute position adjustment at all. If the drive fails

Re: PATA hard disks, anyone?

On 03/25/2018 07:32 PM, Guy N. via cctalk wrote: > The new sysadmin at work is clearing out closets full of junk^H^H^H^H > cool old stuff accumulated by the previous sysadmin. There's a big > carton full of PATA hard disks. Most of them are in the 4.3 GB - 20 GB > range, a few larger, a few

Re: PATA hard disks, anyone?

On 26 March 2018 at 19:34, Tomasz Rola via cctalk wrote: > > I have heard good things of MHDD diagnostic/repair program in the > context of low level format and generally checking health of spinning > disks. That's a new one on me. I have occasionally used, and often

Re: PATA hard disks, anyone?

On Mon, Mar 26, 2018 at 06:22:04AM -0700, Guy N. via cctalk wrote: [...] > I have to wipe the drives before I ship them -- my word of honor to the > sysadmin. I have probably a couple dozen done now that I can ship right > away. The rest will trickle out a little bit slower after that. > > When

Re: SGI Indy power supply: identify this diode?

If only! That question has been asked many times on SGI forums like nekochan, for the Sony PSU (like this one) and also the Nidec. No-one has ever claimed to have seen one, and the chances are Sony wouldn't ever have released them. Yea I was looking for the Nidec one for the Indigo, as mine

Re: SGI Indy power supply: identify this diode?

On 26/03/2018 17:39, et...@757.org wrote: I'm hoping I don't have to breadboard a 1kV supply and find a lot of multi-megohm resistors to try and estimate the breakdown voltage - and then guess at the forward current rating. Is it possible to get the schematics? If only! That question has

Re: SGI Indy power supply: identify this diode?

I'm hoping I don't have to breadboard a 1kV supply and find a lot of multi-megohm resistors to try and estimate the breakdown voltage - and then guess at the forward current rating. Is it possible to get the schematics? - Ethan -- : Ethan O'Toole

set help

Re: SGI Indy power supply: identify this diode?

On 26/03/2018 16:08, Camiel Vanderhoeven wrote: 4B would be a 2.2V zener; 4A would be a 2.0V zener, so that’s odd indeed... That's the idea I had... Except it's not a zener, or at least not anything like those. I took one out of another (working) supply, and I can tell it has a forward

Re: PATA hard disks, anyone?

I've had more replies to this offer than I expected! I'll make a general reply here, and contact everyone who responded off-list. I think the simplest and most cost-effective way to ship these is a USPS Priority Mail flat rate box. I have to wipe the drives before I ship them -- my word of

Re: PATA hard disks, anyone?

>> On Sun, Mar 25, 2018 at 9:32 PM, Guy N. via cctalk >> wrote: >> >> The new sysadmin at work is clearing out closets full of junk^H^H^H^H >> cool old stuff accumulated by the previous sysadmin. There's a big >> carton full of PATA hard disks. Most of them are in the 4.3