[Ham-Computers] RE: Multiple drives, is there a way to . . .

[R B]

Actually, RAID 3 and RAID 4 use a separate parity disk, RAID 5 distributes the parity across the disks in the array.

RAID 3 and 4 are not as efficient (as RAID 5) because of the need to write parity to a separate disk.

----- Original Message ----
From: "WA5CAB at cs.com" <WA5CAB at cs.com>
To: ham-computers at mailman.qth.net
Sent: Thursday, February 7, 2008 12:01:51 PM
Subject: Re: [Ham-Computers] RE:  Multiple drives, is there a way to . . .


Actually, 
the 
least 
risky 
approach, 
although 
not 
the 
cheapest 
unless 
you 
look 
around 
for 
slightly 
older 
but 
unused 
hardware 
in 
surplus, 
would 
be 
an 
outboard 
box 
running 
RAID5 
with 
hot-swap 
capability 
and 
holding 
say 
ten 
drives.  
Buy 
about 
twelve 
of 
the 
same 
drives 
on 
sale 
somewhere 
and 
configure 
the 
box 
with 
eight 
active, 
one 
parity 
and 
one 
standby 
drives.  
:-)

In 
a 
message 
dated 
2/7/2008 
10:31:47 
AM 
Central 
Standard 
Time, 
dfischer at usol.com 
writes: 
> 
Why 
not 
just 
play 
it 
safe, 
simple 
and 
efficient 
and 
buy 
a 
larger 
HD 
to 
> 
begin 
> 
with? 
Since 
Phil 
is 
building 
a 
huge 
OTR 
folder 
his 
need 
for 
space 
is 
not 
> 
going 
to 
end 
here! 
He 
has 
already 
gone 
beyond 
what 
he 
swore 
was 
as 
"big 
as 
> 
it 
was 
going 
to 
get" 
twice 
already.
> 
> 
Better 
yet, 
why 
not 
a 
second 
minimal 
machine 
and 
network 
it 
to 
his 
main 
> 
computer 
and 
put 
all 
of 
HD 
he 
already 
has 
in 
that 
machine?
> 
> 
Although 
what 
you 
suggest 
may 
work 
Aaron, 
would 
it 
not 
be 
less 
risky 
to 
just 
> 
> 
buy 
a 
larger 
drive?
> 
> 
Duane 
Fischer, 
W8DBF/WPE8CXO
> 
dfischer at usol.com
> 
HHI: 
Halligan's 
Hallicrafters 
International
> 
http://www.w9wze.net
> 
HHRP: 
Historic 
Halligan 
Radio 
Project
> 
hhrp.w9wze.net
> 
> 
----- 
Original 
Message 
----- 
> 
From: 
"Hsu, 
Aaron 
(NBC 
Universal)" 
<aaron.hsu at nbcuni.com>
> 
To: 
"I>Ham-Computers" 
<Ham-Computers at mailman.qth.net>
> 
Sent: 
Wednesday, 
February 
06, 
2008 
10:29 
PM
> 
Subject: 
[Ham-Computers] 
RE: 
Multiple 
drives, 
is 
there 
a 
way 
to 
. 
. 
.
> 
> 
> 
>Hi 
Phil 
(et 
al),
> 
>
> 
>Yes, 
it 
is 
possible 
to 
do 
what 
you're 
describing 
via 
RAID-0 
(RAID 
zero). 
> 
>RAID-0 
is 
truly 
a 
misnomer 
as 
there 
is 
no 
redundancy, 
but 
it's 
a 
RAID 
form 
> 
>not 
the 
less.  
Basically, 
RAID-0 
is 
spanning 
- 
the 
data 
"spans" 
across 
the 
> 
>drives, 
so 
if 
you 
have 
two 
200GB 
drives, 
the 
RAID-0 
volume 
will 
show 
up 
as 
> 
>a 
single 
400GB 
volume.  
Three 
200GB 
drives 
will 
make 
a 
600GB 
RAID-0 
volume 
> 
>and 
so 
on.  
RAID-0 
is 
the 
fastest 
of 
all 
RAID 
types 
as 
there 
is 
no 
> 
>checksum 
calculations 
nor 
redundant 
writes.
> 
>

Robert 
& 
Susan 
Downs 
- 
Houston
<http://www.wa5cab.com> 
(Web 
Store)
MVPA 
9480
<wa5cab at cs.com> 
(Primary 
email)
<wa5cab at comcast.net> 
(Backup 
email)
  
 
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