Adobe CS5 Extended, UPG, 1u 65049495 Benutzerhandbuch
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Adobe Photoshop CS5 and Photoshop CS5 Extended
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Recommendations
In general, you should buy as much memory as you can afford and your system can support, since adding more RAM is
one of the simplest ways to improve overall Photoshop performance. But remember that only 64-bit systems can
effectively address more than 4GB of RAM.
one of the simplest ways to improve overall Photoshop performance. But remember that only 64-bit systems can
effectively address more than 4GB of RAM.
Storage (hard disk)
The hard drive in your computer performs three key functions when processing your image files:
• Provides access to the operating system and programs like Photoshop
• Stores your image files
• Gives extra memory resources (called virtual memory or scratch disks) to Photoshop when processing
requirements exceed available RAM
All three tasks are essential for image processing and ensuring that your hard drive is fast; has plenty of spare
space; is free from errors; and is regularly defragmented, which will improve performance in all these key
areas. For maximum performance, a fast, dedicated drive should be allocated for each of these tasks. A typical
setup would include a startup drive for system and program files, a data drive for storing all image and project
files, and a scratch disk drive for virtual memory.
space; is free from errors; and is regularly defragmented, which will improve performance in all these key
areas. For maximum performance, a fast, dedicated drive should be allocated for each of these tasks. A typical
setup would include a startup drive for system and program files, a data drive for storing all image and project
files, and a scratch disk drive for virtual memory.
Startup drive
Both Photoshop CS5 and your operating system have minimum
requirements for hard-drive free space. For Photoshop, it is 2GB, and
for most operating systems, the minimum requirement is 20GB. But
keep in mind that these are minimum requirements, and the more free
space, the better. Speed is also a factor with this drive, and many
high-performance systems now use solid-state drives (SSDs) for
startup, as they provide very fast read and write access.
Both Photoshop CS5 and your operating system have minimum
requirements for hard-drive free space. For Photoshop, it is 2GB, and
for most operating systems, the minimum requirement is 20GB. But
keep in mind that these are minimum requirements, and the more free
space, the better. Speed is also a factor with this drive, and many
high-performance systems now use solid-state drives (SSDs) for
startup, as they provide very fast read and write access.
Scratch disks
When Photoshop needs more memory than that available, it uses a
portion of the hard drive as virtual memory or scratch disks. This
process allows you to work with large image changes that exceed the
capacity of your system RAM. The more hard-drive space available and the faster the drive access speed, the
more efficient this process becomes. As a rule of thumb, aim for hard drives with faster disk rotation (usually
classified in RPM) and faster read/write speeds. If you have the budget, then take a look at SSDs. Ideally, you
should use a dedicated, empty hard drive that is not your startup disk, but if empty drives are not possible, at
least make sure that the free space on your scratch disks is not fragmented.
When Photoshop needs more memory than that available, it uses a
portion of the hard drive as virtual memory or scratch disks. This
process allows you to work with large image changes that exceed the
capacity of your system RAM. The more hard-drive space available and the faster the drive access speed, the
more efficient this process becomes. As a rule of thumb, aim for hard drives with faster disk rotation (usually
classified in RPM) and faster read/write speeds. If you have the budget, then take a look at SSDs. Ideally, you
should use a dedicated, empty hard drive that is not your startup disk, but if empty drives are not possible, at
least make sure that the free space on your scratch disks is not fragmented.
To view or adjust your scratch disk settings, choose Photoshop/Edit > Preferences > Performance and look at
the scratch disks area in the middle of the panel. The panel will show you a list of all hard drives attached to
your system, and you can arrange both the order in which Photoshop uses them and which drives to use at all.
Up to 64EB of scratch disk space is supported on a total of four volumes (an exabyte is equal to 1 billion
gigabytes). If you have more than one drive and you want to include your startup drive as part of the scratch
disk, be sure it is last in order for maximum efficiency. You should also use hard drives with fast access (read/
write) speeds and as a general rule avoid removable or networked drives, which cause performance lags due to
the time required for communication to and from the disks.
the scratch disks area in the middle of the panel. The panel will show you a list of all hard drives attached to
your system, and you can arrange both the order in which Photoshop uses them and which drives to use at all.
Up to 64EB of scratch disk space is supported on a total of four volumes (an exabyte is equal to 1 billion
gigabytes). If you have more than one drive and you want to include your startup drive as part of the scratch
disk, be sure it is last in order for maximum efficiency. You should also use hard drives with fast access (read/
write) speeds and as a general rule avoid removable or networked drives, which cause performance lags due to
the time required for communication to and from the disks.
Faster drive access can be achieved by using an SSD or by installing multiple drives in a RAID system. RAID
setups require two or more disk drives and a special hard drive controller. Many motherboards now have RAID
controllers built in, reducing the need to buy and install a separate board. When first creating the RAID setup,
Photoshop users should set their scratch disk to operate in RAID level 0. This mode uses two or more drives to
provide extra performance by writing information across multiple drives.
setups require two or more disk drives and a special hard drive controller. Many motherboards now have RAID
controllers built in, reducing the need to buy and install a separate board. When first creating the RAID setup,
Photoshop users should set their scratch disk to operate in RAID level 0. This mode uses two or more drives to
provide extra performance by writing information across multiple drives.
How do I know what
is the total amount of
memory (both RAM
and scratch disk space)
available to Photoshop
during editing
operations?
Photoshop displays
RAM and scratch disk
usage and allocation in
the Scratch Sizes section
of the status bar. The
number on the left
represents the amount of
memory currently being
used by the program to
display all open images.
The number on the right
represents the total
amount of RAM available
for processing these
images.
is the total amount of
memory (both RAM
and scratch disk space)
available to Photoshop
during editing
operations?
Photoshop displays
RAM and scratch disk
usage and allocation in
the Scratch Sizes section
of the status bar. The
number on the left
represents the amount of
memory currently being
used by the program to
display all open images.
The number on the right
represents the total
amount of RAM available
for processing these
images.
Assign the drives to be used as a scratch disk, and
the sequence in which they will be used, with the
settings in the Performance section of the
Photoshop Preferences dialog box.
the sequence in which they will be used, with the
settings in the Performance section of the
Photoshop Preferences dialog box.
Which RAID setting
should I use?
should I use?
RAID 0: The fastest RAID
setup is level 0, but it
offers no data protec-
tion (if one of the drives
goes bad, you lose all
the data). This setting is
typically used for scratch
disks.
setup is level 0, but it
offers no data protec-
tion (if one of the drives
goes bad, you lose all
the data). This setting is
typically used for scratch
disks.
RAID 1: RAID level 1
mirrors your data across
multiple drives (if one
fails, you still have your
data). This option is best
for storing your image
files.
mirrors your data across
multiple drives (if one
fails, you still have your
data). This option is best
for storing your image
files.
RAID 5: RAID level 5
combines the two for
faster performance and
redundant data storage.
This makes RAID 5 a good
option for data storage.
combines the two for
faster performance and
redundant data storage.
This makes RAID 5 a good
option for data storage.