From: Paul Winalski <paul.winalski@gmail.com>
To: Clem Cole <clemc@ccc.com>
Cc: The Eunuchs Hysterical Society <tuhs@tuhs.org>, cctalk@classiccmp.org
Subject: Re: [TUHS] Ultrix Tape: Block Size?
Date: Tue, 16 Oct 2018 12:57:58 -0400 [thread overview]
Message-ID: <CABH=_VS-joYBV-+goBJKQwEDYgKbVgsJDuPxCVq+94Rhk2XnNg@mail.gmail.com> (raw)
In-Reply-To: <CAC20D2MpVF2pv3k0vtZLSg26b82hQ=SHPDJy9RKH9vp_-vF7+w@mail.gmail.com>
On 10/15/18, Clem Cole <clemc@ccc.com> wrote:
> #$%^ - they >>weren't<< like DECtape from a reliability standpoint ...
> ᐧ
The original DECtape was extremely reliable. Not so the TK50.
Calling it "DECtape II" was an insult to the original DECtape. The
problem wasn't so much the drive itself, but the controller. In an
effort to reduce costs, DEC used a controller that had insufficient
buffering capability for a streaming, block-replacement tape device
such as the TK50. TK50s were prone to both data-late and overrun
errors.
The block size is almost certainly 512 bytes.
-Paul W.
next prev parent reply other threads:[~2018-10-16 17:14 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-15 19:56 Warren Toomey
2018-10-15 21:00 ` Clem Cole
2018-10-15 21:01 ` Clem Cole
2018-10-15 21:34 ` Warner Losh
2018-10-16 16:57 ` Paul Winalski [this message]
2018-10-16 17:23 ` William Pechter
2018-10-16 17:34 ` Clem Cole
2018-10-16 17:34 ` Paul Winalski
[not found] ` <2658AACC-A451-4861-8CD8-F7E4BED8062A@comcast.net>
2018-10-17 6:14 ` [TUHS] TK50, was: " emanuel stiebler
2018-10-17 12:57 ` Tom Ivar Helbekkmo via TUHS
2018-10-18 7:48 ` Tom Ivar Helbekkmo via TUHS
2018-10-17 15:18 ` Clem Cole
2018-10-16 17:24 ` [TUHS] " Clem Cole
2018-10-19 21:17 ` Dave Horsfall
2018-10-15 21:52 ` Aaron Jackson
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