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From: Warner Losh <imp@bsdimp.com>
To: Clem Cole <clemc@ccc.com>
Cc: The Unix Heritage Society <tuhs@minnie.tuhs.org>,
	Grant Taylor <gtaylor@tnetconsulting.net>
Subject: Re: [TUHS] Pre-init initialization
Date: Thu, 8 Aug 2019 12:59:23 -0600
Message-ID: <CANCZdfqksWFQ-vMZtZjaQO0agCrdrDL0HeMEwjD1mLnBC9+CVA@mail.gmail.com> (raw)
In-Reply-To: <CAC20D2Pu0Jwfs=qFc2gVAzDpyuR4gvPepo8RVuC-=YsPM4keoQ@mail.gmail.com>

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On Thu, Aug 8, 2019 at 7:43 AM Clem Cole <clemc@ccc.com> wrote:

>
>
> On Wed, Aug 7, 2019 at 12:40 PM Warner Losh <imp@bsdimp.com> wrote:
>
>> This obviated the need to copy a filesystem to a new disk's swap space
>> and then use that to really install the system.
>>
>
> Thanks for the reminder.   I don't remember if V7 on the PDP-11 used the
> swap space (but I don't think so). That said, I fairly sure that by BSD 4.1
> the boot loader did, which I think is when that trick was first added to
> boot phase.
>

Just checked the archives. V7 had a stand alone program to restore a
filesystem image form the tape to the disk that you ran after running the
stand alone program to partition and newfs the disk... I think you are
right on your timeline. I installed a dozen Sun3 boxes from tape and hated
mistyping the file number and having to start over...


> Again, it was all about trying to get rid of the special /stand version of
> things.   Funny, history would move on and we come back to that idea with
> busybox 🤔
>

Well, busybox is special in many ways, so there's that in common with
/stand, but it runs under a full otherwise standard kernel, not as some
special mini-exec that provides just enough of the unix APIs to keep the
standalone programs happy.

Warner

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  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-06 23:46 Grant Taylor via TUHS
2019-08-07  1:22 ` Andrew Warkentin
2019-08-07 13:04 ` Clem Cole
2019-08-07 16:40   ` Warner Losh
2019-08-08 13:31     ` Theodore Y. Ts'o
2019-08-09  1:52       ` Grant Taylor via TUHS
2019-08-10  0:23         ` Theodore Y. Ts'o
2019-08-10  2:28           ` Grant Taylor via TUHS
2019-08-10  4:21             ` Kevin Bowling
2019-08-10  4:50               ` Grant Taylor via TUHS
2019-08-10  4:52               ` Adam Thornton
2019-08-08 13:43     ` Clem Cole
2019-08-08 18:59       ` Warner Losh [this message]
2019-08-09  1:46   ` Grant Taylor via TUHS
2019-08-09  2:15     ` Warner Losh
2019-08-09  6:43       ` Kevin Bowling
2019-08-10  1:45 ` Chris Hanson

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