Re: [re]writable cdrom drive

1999-08-19 Thread John R. LoVerso

> > This does not actually erase the data, so if you have used say 100MB
> > you will only have 550MB left.  You can actually erase the media using
> > 'cdrecord blank=all', which takes a while.
> In my experience, this is not true.  I have used blank=fast on a CDRW
> that has over 500 MB written, and then written another 500 MB without

I think there's a little confusion here and I don't want to add to it.  But...

I thought it the case that a CDRW that is fully reformatted (taking 30 minutes;
equivalent to blank=all?) can hold 650MB, while a CDRW that is quickly
reformatted (to packet writing aka DirectCD-formatting; is this what blank=fast
does?) can hold only about 500 MB.  It doesn't matter how is on the disk before
the quick format happens.

John


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Re: cd writer recommendation?

1999-08-18 Thread John R. LoVerso

> One thing www.buy.com is really good for, ...
> is to get pricing information on a general search.  You can then use it
> to do comparison shopping.

Or, just use one of the pricing web servers.  I use (and in the order I prefer)
Pricescan, KillerApp, and Shopper (web pages are s/.*/www.\1.com/, of course).
These allow you to search for the best price from a number of different vendors,
including Buy, Onsale/AtCost, etc.

The best price on the Yamaha CRW4416S (4x4x16 SCSI INT) is $186, found at
Pricescan and from at least 3 vendors.  The best price on the CRW6416S (6x4x16
SCSI INT) is $246, found at Shopper (the only one quoting this drive).


I like KillerApp's interface the best, but it doesn't carry as many products as
the others and lately it's pricing database doesn't seem up to date.  Unlike the
others, it also gives you technical specs on the products, as well as links to
the mfg's specific product page.  This is invaluable.  KillerApp also lets you
make comparisions of multiple products.

Pricescan has a search interface similar to, and slightly better than,
KillerApp's.  It far beats Shopper in terms of usefulness.  But, Shopper has
more products listed.

John


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Re: net.inet.tcp.always_keepalive on as default ?

1999-06-04 Thread John R. LoVerso
> "32bit is enought for everthing"

Just mention the horrible header offset field.  Lots of good TCP nits.


Anyway, can't this argument be settled by separating the mechanism and policy. 
Adding a simple rc.conf tweak to enable them should be enough.


But, consider going back to the discusssions leading up to the Host Requirements
RFC (1122).  The particular problem was that the original timeout value for
keepalives was tiny (a few minutes).  1122 dictated the corrections for this. 
Here are the important points from section 4.2.3.6:

1. keepalives MUST default to off
2. the minimum timeout MUST be no less than two minutes
3. keep-alives SHOULD only be invoked in server applications

This mostly says that always_keepalive should continue to default to off (but,
perhaps, a easy hook in rc.conf should exist to turn them on).

John


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Re: Berkeley DB 1.85 --> 2.0

1999-05-14 Thread John R. LoVerso
Of course, DB 2 is still available as an easily installed port/package.

John


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Re: ATTENTION PLEASE: g77 in base system.

1999-04-09 Thread John R. LoVerso
> Right or wrong, you forgot:
> 
> 5.  BSD tradition.
> 
> Case 5 justifies Fortran.

By that logic, you'd also have to add a Pascal compiler to the base system.

Neither makes much sense when they can both be ports (or packages) easily
addable at install or compile time by the small % of the FreeBSD population that
will actually use them.

John
"BSD & me: together since 1983"


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Re: EGCS breaks what(1)

1999-04-06 Thread John R. LoVerso
> 'what' is broken.  C does not impose any sort of address ordering
> restriction on globals or autos that are declared next to each other.

Right, except that 'what' isn't broken.  It is vers.c (and conf/newvers.sh)
that is broken, believing that the two variables will be allocating in 
contiguous memory.

Changing newvers.sh to generate
char sccs[] = "@(" "#)" "FreeBSD ...";
char version = "FreeBSD ...";
will make "what" on the kernel work again, at the expense of about 100
duplicated
bytes.

The real question is whether the extreme alignment and padding used by EGCS can
be turned off, especially for 486s.

John


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Re: T/TCP in FreeBSD-3.x

1999-01-22 Thread John R. LoVerso
> Why I'm asking about this, is because I recently read an advice in one
> of the FreeBSD mailing lists,
> about "Why my dial-up PPP connection from a FreeBSD box is so slow
> comparing with Windows NT
> (about ten times slower)?"
> 
> And the advice was (without explanations): "Try to switch off the
> TCP_EXTENSIONS in /etc/rc.conf".

This isn't something that can be fixed in FreeBSD's TCP.  Rather, it is
a general bug in how TCP Header Compression is defined for PPP and SLIP.

Basically, TCP Header Compression will not compress any TCP segment that
contains a TCP option.  This means the use of ANY TCP option, whether
T/TCP or RTTM, will cause your PPP links to not compress those packets
and, thus, make your link slower.

Unfortunately, just fixing FreeBSD isn't the answer, because you need to
fix EVERY implementation of PPP to accept and generate TCP segments with
options.

The new "IP Header Compression" Internet Draft specifies how this is to
be done.

John

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