Hey there,
There is a problem here, and that is your assumption that the 18% grey would
be at RGB 117/117/117. RGB is a totally device specific colour space and so
you are completely at the mercy of the video card and monitor and
resolution. The correct value for mid grey would be...
I have just ordered a 60 Gig Maxtor ATA 100 drive (ATA 133 is also
available) I have done this because it is far cheaper than buying
another 36 gig drive to go on my U160 SCSI channel. I can get the Maxtor
drives for around 60 UK pounds, which means I could buy 4 of these IDE
drives for the same
Bill ,
Fantastic , the Mac OS 9.2:Photos works perfectly.
Thanks again Bill
All the Best
Eric
Eric--
Try Mac OS 9.2:Photos
or Mac OS 9.2/Photos
Note the : vs the / used to join the folder name to the hard disk name.
--Bill
At 3:47 PM + 10-11-01, Eric
IMO the best price/performance/data safety setup is IDE Raid 5. If you buy a
Ide Raid 5 card (Adaptec makes a good one: 2400A, which sells for around 300
US) you can then connect, say four IDE 100GB drives and get an array which
is very fast AND fairly fault tolerant. You pay the equivalent of
Andrea de Polo [EMAIL PROTECTED] wrote:
I have a CreoScitex scanner with attached a, Apple G4 Silver 733 with OS
9.2.1 and 1GB of ram;
I noticed that the internal HD is a slow 5400rpm UltraAta HD; question:
since I work only with
Photoshop and my images are about 60mb in size and I just have
Ken Durling [EMAIL PROTECTED] wrote:
On a related note - I kind if wish Vuescan didn't leave it so easy to
overwrite a file, since it doesn't ask you if you want to overwrite
the file of the same name. I've had to rescan a couple when I forgot
to go into files and change the name. This is
Bob Shomler [EMAIL PROTECTED] wrote:
How does this equipment manage to make a colour positive and at the same
time remove the orange mask?
Wouldn't this be the same type of digital image processing as film scanner
software
uses to produce a preview of a scanned negative? How is this imaging
Ned writes ...
There is a problem here, and that is your assumption
that the 18% grey would be at RGB 117/117/117.
... The correct value for mid grey would be... whatever the RGB
value you have measured off your monitor that matches mid grey. ...
...
Basically - the only way to do this
This is an 80-pin, meant to be put in a rack mount. You can get an adapter,
but you're limited in the number of drives you can use in a chain with
adapters and the adapters are about $25.
Better to find a 68pin.
Tom
From: Ezio c/o TIN
Quantum 10KRPM 18GB ultra160 Scsi Raid DUTCH
Item #
If you're using PS, click on each the points in the image that you want to set, check
the read numbers, then click, in the separate channels, on the curve at or about that
point, they type in the read number in the input box and your desired output number in
the output box. Do this for each
If you're using PS, click on each the points in the image that you want to set, check
the read numbers, then click, in the separate channels, on the curve at or about that
point, they type in the read number in the input box and your desired output number
in the output box. Do this for each
Preben,
Since you seem to be knowledgeable about IDE RAID matters, I wish to make
use of your knowledge as a resource even if it is OT for this list. I
recently bought an ABIT motherboard with RAID. The manual is not very clear
as tot he difference between RAID 0 (striping) and what it does
your assumption being that 0,0,0 is totally black and 255,255,255
is totally
white in that 2.2 gamma colour space. Would be a pretty daft
colour space as
you can't get either on a monitor or printer and so you end up wasting a
whole bunch of values that could never be properly
Ned writes ...
From: michael shaffer [EMAIL PROTECTED]
Because my system is calibrated, I am not assuming. If
my monitor is truely gamma calibrated, and I use a gamma=2.2
working color space, then a 18% gray card's RGB value should
be R=G=B=117aren't mine). ...
your assumption being
on 11/11/01 11:53 AM, Ned Nurk at [EMAIL PROTECTED] wrote:
From: michael shaffer [EMAIL PROTECTED]
Because my system is calibrated, I am not assuming. If my monitor is
truely gamma calibrated, and I use a gamma=2.2 working color space, then a
18% gray card's RGB value should be R=G=B=117
Maris writes ...
If you're using PS, click on each the points in the image that
you want to set, check the read numbers, then click, ...
Bob writes ...
I think if you control-shift-click on each point it will set
those points on the individual channel curve line.
...
Control-clikking a
Laurie,
spanning: The drives are cascaded. So if you have a 60GB and 80GB HD
you get a 140GB HD. Except that you are able to see one big HD there is
no advantage regarding speed, etc.
striping: Puts drives in parallel configuration. The smallest HD limits
the capacity. For example if you have a
I'll jump in here.
Raid 0, striping, assigns half of the data to one
drive, the other half to the other drive. The writes
happen more or less simultaneuosly, so large file
operations happen in roughly half the time.
Raid 1 is, as you said, mirroring, where all data are
duplicated, so that if a
Hi Laurie,
You basically got it right:
Raid 0 or striping is putting two or more harddisks together into one bigger
disk. The Raid controller and software then divides say a 55 MB file in two
or more parts and writes them to the disks simultaneously. This is reversed
for reading files. The pros
John Brownlow writes ...
on 11/11/01 11:53 AM, Ned Nurk at [EMAIL PROTECTED] wrote:
...
generate an icm profile for you monitor (i.e. with a color sensor) and
scanner and ignore the rgb values.
this is nuts. loads of people, me included, edit by the numbers. ...
I'm still trying to
If you're using PS, click on each the points in the image that
I think if you control-shift-click on each point it will set
those points on the individual channel curve line.
...
Control-clikking a region in the image allows me to manually set the curve
... for each RGB channel ... a bit
Laurie wrote:
(spanning). I understand what RAID 1 (mirroring) is and how
it works; but I really do not understand how RAID 0 works or
what parallel operation of the two drives on the channel means
and entails.
Striping simply means that data is interleaved on different disks. In a
simple
I just wanted to note that RAID 0 is, in most cases, a bad idea. The reason
is that if you stripe your data across multiple disks and one fails, you
lose all the data. It's better to split the files up among many, smaller
logical drives. It's great from a performance standpoint but that's
ShAf
I haven't been following from the beginning so I'm not clear on what you are
trying to do, but two/three things things:
Different RGB color spaces will yield different values for the same color.
That's why when you convert to profile you can choose to keep the appearance
of the colors, but
From: John Brownlow [EMAIL PROTECTED]
this is nuts. loads of people, me included, edit by the numbers. The whole
point of an ICM profile is so that the same RGB values display the same on
different profiled devices.
Sorry to tell you, but you are *so* wrong. RGB values mean diddly squat.
jeez its late and i've had too many beers but ill give it a go.
(extreme example) imagine we had a linear luminocity scale of 0-100 (0% to
100%) and these are represeted in values in a file between 0-100. The best
device you have got can represent say 10%-90%. anything below 3 or above 96
is
Pat , you are right .
Please, let me add some comments while OT ... I think this matter of
efficiency and speed is an argument directly involving our group seen that
e-photography is meaning big amounts of data and (eventually) long waitings
in front of a screen .
The Adaptec RAID
card
I just wanted to note that RAID 0 is, in most cases, a bad idea.
The reason
is that if you stripe your data across multiple disks and one fails, you
lose all the data. It's better to split the files up among many, smaller
logical drives. It's great from a performance standpoint but that's
RGB values mean diddly squat.
They are just a measurement of the amount of current in a scanner
ccd
Only if it is a raw scan. A typical scan has the data setpointed and
tonally adjusted. That means that 0 IS the darkest value in the resultant
file, and 255 IS the lightest value in the
- Original Message -
From: Rob Geraghty [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Sunday, November 11, 2001 10:53 PM
Subject: filmscanners: RE: filmscanners: Best solution for HD and images
IMO the higher RAID types are fine for servers, but not worth the hassle
for home use. I
- Original Message -
From: Ned Nurk [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Sunday, November 11, 2001 11:36 PM
Subject: Re: filmscanners: creating correction curves from scanned
calibration chart?
From: John Brownlow [EMAIL PROTECTED]
this is nuts. loads of people, me
Paul wrote:
I just wanted to note that RAID 0 is, in most cases,
a bad idea. The reason is that if you stripe your
data across multiple disks and one fails, you
lose all the data.
This is true - however most of us rely on one hard drive for *everything*.
Striping across two drives gives
Ezio wrote:
I really cannot understand why it would be needed such a complication and
dependancy from the controller vendor when the SCSI hard drives cost almost
the same (or 20% more max) of IDE hard drives !
Ezio, I know we've been here before, but SCSI isn't a cheap option for everyone.
--- Austin Franklin [EMAIL PROTECTED] wrote:
I just wanted to note that RAID 0 is, in most cases, a bad idea.
The reason
is that if you stripe your data across multiple disks and one
fails, you
lose all the data. It's better to split the files up among many,
smaller
logical drives.
Also consider that striping doubles your chances of losing your
data
NO it does not. MTBF is NOT additive. Whether you have 1 or 100 devices
that have a MTBF of 10,000 hours, the MTBF of the system is still 10,000
hours.
Thus in the case of SCSI where you cannot (by definition) overcome the
number of 6 devices x chain/controller,
WHAT SCSI are you talking about? Try 16. not 6.
BTW , this method compulsorily implies a DOUBLE WRITING need i.e.
write the
data + write the new parity (even if on another disk)
However, for a neutral gray
they (RGB) SHOULD all be the same number.
no, total rubbish. the profile defines the relationship between the value
and the actual colour output. Profiles do NOT attempt to balance the RGB or
CMYK or CMYKOG or whatever values, they are simply the actual transfer
My point is that, with RAID 0, if one disk fails the data on all the disks
is lost. Also, MTBF is additive in this case because of what I previously
said. You've got more than one set of platters and heads to fail and any
one of them failing blows away the data. I realize the chances of
on 11/11/01 8:54 PM, Rob Geraghty wrote:
PS Can someone confirm for me that all this discussion of IDE RAID is
irrelevent
to Mac users? Are there IDE RAID solutions for Mac?
There are IDE RAID solutions for the Mac but not many. Only around three or
4 last I looked. Sonnet and Acard make
on 11/11/01 1:53 PM, LAURIE SOLOMON at [EMAIL PROTECTED] wrote:
Preben,
Since you seem to be knowledgeable about IDE RAID matters, I wish to make
use of your knowledge as a resource even if it is OT for this list. I
recently bought an ABIT motherboard with RAID. The manual is not very
on 11/11/01 8:54 PM, Rob Geraghty at [EMAIL PROTECTED] wrote:
Paul wrote:
PS Can someone confirm for me that all this discussion of IDE RAID is
irrelevent
to Mac users? Are there IDE RAID solutions for Mac?
I only know of SCSI RAID solutions (Adaptec, etc.)
Jim Snyder
The RAID 0 is taking half
the data and
pushing it to one hard drive, and the other half to the second,
giving you a
slight edge in speed since the bus to each hard drive can be loaded while
the other hard drive is munching on the data it just received.
Not if implemented correctly. If
To Preben:
Thanks for your response and patience. The Abit board does permit JBOD; but
it does not provide RAID 5 as you have noted. When I asked about what
appeared to be a contradiction between what you suggested and what the ABIT
manual said I did not realize that there was a RAID 5 and
My point is that, with RAID 0, if one disk fails the data on all
the disks
is lost.
And if you have one disk, and it fails, all data is lost.
Also, MTBF is additive in this case because of what I previously
said.
No it is NOT. I designed RAID controllers and disk subsystems, as well
Thus in the case of SCSI where you cannot (by definition) overcome the
number of 6 devices x chain/controller,
WHAT SCSI are you talking about? Try 16. not 6.
How many addresses have you per controller ?
from 0 to 6 = 7 but 1 is the controller itself.
SCSI is not IBM SSA . SCSI = 6
Congratulations for the professional results Rob ! :-)
Rob , we have been here before , you are right , but I am not living in USA
, but in Italy and I buy on eBay USA with credit card,
I have 3 U160 IBM 1rpm and NO FANS at all while the box is a cheap box I
have assembled on my own with a
It *IS* more unsafe to use RAID0. And MTBF *IS* additive.
No and no. I designed SCSI controllers and disk subsystems (for the storage
division of one of the top computer manufacturers) for years, as well as
tested disk subsystems. I know how MTBF is determined.
Actually,
more exactly it
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