Originally
posted 05/23/03 by rob-ART
morgan,
mad scientist
Updated 5/27/03 with comment
on 32 bit PCI bus vs 64 bit PCI bus
For benchmarking
a drive, it's hard to beat Intech's
QuickBench
X. For
sustained test, I use 100MB block size so drive
cache isn't a factor. For the random test, I
average the 128K, 256K, 512K, and 1024K random
transfers.
IN CASE YOU
HAVEN'T SEEN PAGE
ONE,
IT CONTAINS REAL WORLD TESTS.
ANALYSIS
1. There is
little difference in the speed of various brands of
FireWire 800 enclosures, assuming they have the
same kind of hard drive. With the exception of
LaCie, the original source of the bridgeboards is
MacPower.
The same
is true of FW800 PCI cards tested. All but
LaCie's are have MacPower as OEM and all ran
about the same speed.
2. The LaCie d2
was slower in some tests due its use of the Western
Digital 2000BB drive. Huh? Yes. The other
enclosures had the Hitachi/IBM 180GXP drive. When I
put a WD2000BB in the FWDepot enclosure, it
produced almost identical (slower) numbers to the
LaCie d2 with the WD2000BB.
Therefore,
if you want the best performance from your
FireWire 800 enclosure, I recommend you opt the
180GXP with 8MB buffer in either the 120GB or
180GB size. It's even faster than other drives
when used in a FireWire 400 case.
2. The tests
above were done using the built-in FireWire 800
port of the Power Mac G4/1.42GHz MP. When the
FireWire 800 PCI card was used, the sustained and
random write speeds dropped 8% and 16%
respectively. However, if you don't have built-in
FireWire 800, you're still better off using a
FireWire 800 PCI card than the built-in FireWire
400.
3. FireWire 800
is now every bit the equal in speed to its Ultra
ATA-133 cousin. Plus, it has the added versatility
of being external and hot-swappable. Speaking of
versatility, the FWDepot and OWC enclosures
featured a FW400 port and USB 2.0 port in addition
to two FW800 ports. The LaCie enclosures include a
USB 2.0 port.
4. Don't expect
all Power Macs or PowerBooks to run the FireWire
800 drives at the same speeds published above. For
example, when I ran a LaCie FW800 drive on a 17"
PowerBook, it ran my real world tests 12% slower on
average. But then it could be argued that the
Photoshop and QuickTime tests benefit from the
presence of dual processors on the Power
Mac.
I
commented in an earlier version of this article
that "older" Power Macs with 32 bit PCI bus
would probably run FW800 PCI cards slower than
Power Macs with 64 bit PCI bus. However, when I
checked the Apple technical documents, I
discovered Apple has been using 64 bit PCI slots
since the advent of the Blue
and White G3 Power
Macs.
Some of you
have asked about FW800 CardBus on a PowerBook.
Since CardBus is only 32 bits "wide," there's
some skepticism as to whether FW800 CardBus will
go as fast as a FW800 PCI card on a 64 bit bus.
I'm withholding my opinion until I can actually
test one. After all, Ultra SCSI supported up to
80MB/s
per channel on a 32 bit PCI
bus.
IN CASE YOU
HAVEN'T SEEN PAGE
ONE,
IT CONTAINS REAL WORLD TESTS.
RELATED
LINKS
All the currently
shipping FireWire 800 products are based on the
Oxford 922 chip set. Read more about their bridge
chip and bridge board at Oxford's
website.
XLR8YourMac
has also tested FireWire 800 products.
Check out Bare
Feats' articles on FireWire
800 vs USB 2.0 vs Ultra ATA vs Ultra
SCSI,
two, three, and four drive FireWire
800 RAID,
and FireWire 800 optimizations.
Storage
Technology
tested the newest Hitachi-IBM, Maxtor, Seagate, and
Western Digital Ultra ATA drives. Although they
test on Windows systems using Ultra ATA
controllers, the results are instructive, since
those are the Hitachi-IBM and Western Digital
drives are being shipped in the new FireWire 800
case kits from OWC and LaCie. Be aware that putting
the same drives in FireWire 800 cases may produce a
different results from Ultra ATA controllers.
In
my tests,
the Hitachi-IBM drive out performed the Western
Digital drive.
TEST NOTES
& WHERE TO BUY
The test computer
was our trusty Apple
Power Mac
G4/1.42GHz Power Mac running OS X (10.2.6).
Enclosures used
in the test included:
1.
FWDepot
IceCube800
Enclosure
used our Hitachi-IBM
180GXP 180GB
drive.
You can purchase the enclosure and FW800 PCI card
from them direct.
2.
Other
World Computing's
Mercury Elite Pro FireWire 800 Enclosure with a
pre-installed Hitachi-IBM
180GXP 180GB drive.
Their enclosures come in other drive capacities.
They also sell the empty enclosure and a FW800 PCI
card.
3.
LaCie's
d2 FireWire 800 enclosure with pre-installed 200GB
WD2000BB drive.. They are available in up to 500GB
capacity. You can purchase enclosures and LaCie's
own FW800 PCI card direct from Lacie's Online Store
or from Other
World Computing
or from Small
Dog Electronics.
4.
Wiebetech's
FW800 enclosure used our Hitachi-IBM
180GXP drive.
Starting in June, you can purchase this enclosure
direct from Wiebetech or from Dr.Bott.
TransIntl.com
has the Hitachi-IBM
180GXP drive
which is the fastest drive you can put in a
FireWire 800 case. These drives also scream when
used in an Ultra ATA setup. Check prices at
Googlegear.com
also.
Each enclosure
kit comes with at least one FW800 cable. Additional
FireWire 800 cables are available from the
Apple
online store.
SEE
"HOW
WE TEST"
for details on the tests reflected in the graphs.
We recently added a new random test. For RANDOM
READ/WRITE, I averaged the 128K, 256K, 512K, and
1024K random read/writes from Intech's
QuickBenchX. I feel they best reflect typical
random access block sizes used by the OS X and most
applications.
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