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Path: utzoo!mnetor!seismo!gatech!hao!ames!styx!ptsfa!ihnp4!homxb!mr
From: mr@homxb.UUCP (mark)
Newsgroups: comp.sys.att
Subject: Re: info on 7300 disk drives
Message-ID: <303@homxb.UUCP>
Date: Thu, 14-May-87 13:06:34 EDT
Article-I.D.: homxb.303
Posted: Thu May 14 13:06:34 1987
Date-Received: Sat, 16-May-87 13:56:43 EDT
References: <6485@mhuxu.UUCP> <1390@hou2d.UUCP> <506@unisec.usi.com> <166@gizzmo.UUCP>
Organization: AT&T
Lines: 54
Keywords: 7300 drives
Summary: slightly corrected info.

In article <166@gizzmo.UUCP>, mark@gizzmo.UUCP (mark hilliard) writes:
> >>Your 7300 diagnostic disc tells you all the acceptable types of
> >>HD drives in the HD formatting menu. This includes a 67MB drive.
> 
> >The Unix PC will support a lot of different disk drives.  To get a partial
> >list look in /usr/lib/iv.
> 
> Yes the pc will support a lot of drives. I recently put an 80 meg on my 
> system (Micropolis 1325) and  a Wren II on a friends system.  The cables

The Micropolis 1325 is a 70 MB. which formats to 67 MB.

> are easy to make and install. You can purchase a Wren II from Software
> Solutions for $950.00 with a 1 year warrenty. This drive will format
> out to 62 meg due to the fact that it has 1 more head than the 7300
> can handle.  The 1325 can be purchased for about $1200 and formats out
> to 67 meg on the 7300. Both of these drives are voice coil heads with
> 36ms average access time. Beware of lower cost drives. Most including

Average access time for the 325 is 28 ms.

> Seagate are stepper motor drive for the heads and are noisy and slower.
> The hard drive on any virtual memory system (7300) is the weakest point
> in the system, and therefore the one item that you should pay more to get
> a faster one. Look for a AVERAGE ACCESS TIME of 38 ms or LESS. Track to 
> track time is meaningless if the average time is slower.  The last time
> that I looked there were about 40 drives listed in the iv directory,
> but you can install ANY SASI or SCSI drive on the 7300. 
> 
> Check with Amperfax on their 2 drives that they offer and ask about
> speed and price, but dont forget about warrenty. Warrenty is more important
> than price in my view. Amperfax gives TWICE the warrenty as ANYONE else.
> If you want to go for a 80 meg (67 meg) drive, contact Software Solutions
> about the Wren II (1 year warrenty), or look in byte for adds on the 1325.
> The 1325 is the BEST 80 meg drive on the market (quality and speed) but it
> is also the most expensive.  

It has gone down in price drastically over the last year. I bought one
for about $1750.00 last year and have seen it advertised recently for
$950.00

> There are several articles on the unix-pc.general newsgroup concerning drives
> and installation of drives on the 7300, and one that actually gives step
> by step instructions. Investigate joining this private news service and you
> too can receive this information first hand. There are feeds all over the
> country.  Contact me for information on how to access this private news
> service.
> 
>                                                     ethos----------\
> Mark Hilliard                                seismo!rochester!kodak!gizzmo!mark
> 					            fthood---------/

Mark
homxb!mr