DiskTester benchmarks
I just ran the disktester benchmarks.
The "OS" volume is an Intel SSD. The "User" volume is 3 x velociraptor 300gb in a Raid 0 stripe.
Looking like I expected here.
bash-3.2$ disktester show-info
DiskTester 2.0 (C) 2003-2006 diglloyd, Inc. All Rights Reserved
3 volumes: "OS", "User", "DiskTester_Install"
KB=1024 bytes, MB=1024KB, GB=1024MB, TB=1024GB
------------------------------------- "OS" -------------------------------------
Volume name: "OS"
Create date: Tuesday, March 10, 2009 5:49:46 AM PT
Modify date: Wednesday, March 11, 2009 3:19:29 PM PT
Backup date: Thursday, December 31, 1903 4:00:00 PM PT
Checked date: Thursday, December 31, 1903 4:00:00 PM PT
File count: 507152
Folder count: 128108
Total bytes: 79682387968 (74.2GB)
Free bytes: 48641122304 (45.3GB, 61.0%)
Block size: 4K (4096 bytes)
Total blocks: 19453708
Free blocks: 11875274 (61.0%)
Next allocation: 0
Rsrc fork clump size: 4K (4096 bytes)
Data fork clump size: 4K (4096 bytes)
Next catalog ID: 0
Flags: 4020 = {default volume}
File system ID: HFS Plus
Signature: H+ (HFS Plus)
Drive number: 1
Driver ref num: 0
Largest contiguous block: 44.0GB
------------------------------------ "User" ------------------------------------
Volume name: "User"
Create date: Tuesday, March 10, 2009 3:40:13 PM PT
Modify date: Wednesday, March 11, 2009 3:19:22 PM PT
Backup date: Thursday, December 31, 1903 4:00:00 PM PT
Checked date: Thursday, December 31, 1903 4:00:00 PM PT
File count: 21602
Folder count: 2621
Total bytes: 899175186432 (837.4GB)
Free bytes: 801406861312 (746.4GB, 89.1%)
Block size: 4K (4096 bytes)
Total blocks: 219525192
Free blocks: 195655972 (89.1%)
Next allocation: 0
Rsrc fork clump size: 4K (4096 bytes)
Data fork clump size: 4K (4096 bytes)
Next catalog ID: 0
Flags: 4000 = {}
File system ID: HFS Plus
Signature: H+ (HFS Plus)
Drive number: 1
Driver ref num: 0
Largest contiguous block: 741.1GB
Command "show-info" executed in 3.08 seconds.
bash-3.2$ disktester run-area-test OS
DiskTester 2.0 (C) 2003-2006 diglloyd, Inc. All Rights Reserved
=> Allocating maximum size contiguous file on "OS" (74.2GB)...44.0GB (59.3% of volume size)
NOTE:
(1) Contiguous space equal to 59.3% of volume "OS" was allocated. Depending on the location of the contiguous space (which disktester cannot determine), TOP SPEED MIGHT BE AS MUCH AS 32.6% FASTER (worst case, sequential). To avoid this ambiguity, test a freshly-formatted volume.
=> Using test size of 512MB, 4MB at a time, across a 44.0GB test file.
=> Testing at: 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%
Area 0% (offset 0B): writing...79.7MB/sec, reading...265MB/sec
Area 10% (offset 4.40GB): writing...79.0MB/sec, reading...265MB/sec
Area 20% (offset 8.80GB): writing...81.0MB/sec, reading...264MB/sec
Area 30% (offset 13.2GB): writing...80.5MB/sec, reading...264MB/sec
Area 40% (offset 17.6GB): writing...80.7MB/sec, reading...265MB/sec
Area 50% (offset 22.0GB): writing...78.9MB/sec, reading...260MB/sec
Area 60% (offset 26.4GB): writing...80.7MB/sec, reading...265MB/sec
Area 70% (offset 30.8GB): writing...79.4MB/sec, reading...265MB/sec
Area 80% (offset 35.2GB): writing...79.4MB/sec, reading...261MB/sec
Area 90% (offset 39.6GB): writing...79.6MB/sec, reading...260MB/sec
Area 100% (offset 43.5GB): writing...79.5MB/sec, reading...265MB/sec
======== Wednesday, March 11, 2009 3:20:39 PM PT, volume "OS" (74.2GB) =======
------------------ Averages for "OS" (512MB/4MB, 1 iteration) ------------------
Area (44.0GB) Write MB/sec Read MB/sec
0% 79.7 265
10% 79.0 265
20% 81.0 264
30% 80.5 264
40% 80.7 265
50% 78.9 260
60% 80.7 265
70% 79.4 265
80% 79.4 261
90% 79.6 260
100% 79.5 265
Average write speed across the volume: 79.9MB/sec
Average read speed across the volume: 263MB/sec
Command "run-area-test" executed in 92.13 seconds.
bash-3.2$ disktester run-area-test User
DiskTester 2.0 (C) 2003-2006 diglloyd, Inc. All Rights Reserved
=> Allocating maximum size contiguous file on "User" (837.4GB)...741.1GB (88.5% of volume size)
NOTE:
(1) Contiguous space equal to 88.5% of volume "User" was allocated. Depending on the location of the contiguous space (which disktester cannot determine), TOP SPEED MIGHT BE AS MUCH AS 9.2% FASTER (worst case, sequential). To avoid this ambiguity, test a freshly-formatted volume.
=> Using test size of 512MB, 4MB at a time, across a 741.1GB test file.
=> Testing at: 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%
Area 0% (offset 0B): writing...331MB/sec, reading...354MB/sec
Area 10% (offset 74.1GB): writing...333MB/sec, reading...330MB/sec
Area 20% (offset 148.2GB): writing...325MB/sec, reading...317MB/sec
Area 30% (offset 222.3GB): writing...316MB/sec, reading...310MB/sec
Area 40% (offset 296.5GB): writing...304MB/sec, reading...308MB/sec
Area 50% (offset 370.6GB): writing...293MB/sec, reading...287MB/sec
Area 60% (offset 444.7GB): writing...285MB/sec, reading...281MB/sec
Area 70% (offset 518.8GB): writing...272MB/sec, reading...268MB/sec
Area 80% (offset 592.9GB): writing...248MB/sec, reading...249MB/sec
Area 90% (offset 667.0GB): writing...225MB/sec, reading...236MB/sec
Area 100% (offset 740.6GB): writing...351MB/sec, reading...340MB/sec
====== Wednesday, March 11, 2009 3:22:19 PM PT, volume "User" (837.4GB) ======
----------------- Averages for "User" (512MB/4MB, 1 iteration) -----------------
Area (741.1GB) Write MB/sec Read MB/sec
0% 331 354
10% 333 330
20% 325 317
30% 316 310
40% 304 308
50% 293 287
60% 285 281
70% 272 268
80% 248 249
90% 225 236
100% 351 340
Average write speed across the volume: 299MB/sec
Average read speed across the volume: 298MB/sec
Command "run-area-test" executed in 41.15 seconds.
bash-3.2$ disktester run-sequential-suite OS
DiskTester 2.0 (C) 2003-2006 diglloyd, Inc. All Rights Reserved
=> Allocating maximum size contiguous file on "OS" (74.2GB)...44.0GB (59.3% of volume size)
NOTE:
(1) Contiguous space equal to 59.3% of volume "OS" was allocated. Depending on the location of the contiguous space (which disktester cannot determine), TOP SPEED MIGHT BE AS MUCH AS 32.6% FASTER (worst case, sequential). To avoid this ambiguity, test a freshly-formatted volume.
=> Using test size of 512MB at start (0%), within a 44.0GB test file.
Chunk Size 256K, test area start: writing...72.8MB/sec, reading...204MB/sec
Chunk Size 512K, test area start: writing...76.9MB/sec, reading...228MB/sec
Chunk Size 1MB, test area start: writing...75.3MB/sec, reading...227MB/sec
Chunk Size 2MB, test area start: writing...77.5MB/sec, reading...254MB/sec
Chunk Size 4MB, test area start: writing...79.1MB/sec, reading...263MB/sec
Chunk Size 8MB, test area start: writing...80.9MB/sec, reading...269MB/sec
Chunk Size 16MB, test area start: writing...77.7MB/sec, reading...266MB/sec
Chunk Size 32MB, test area start: writing...79.7MB/sec, reading...270MB/sec
Chunk Size 64MB, test area start: writing...76.1MB/sec, reading...180MB/sec
Chunk Size 128MB, test area start: writing...77.5MB/sec, reading...269MB/sec
Chunk Size 256MB, test area start: writing...79.7MB/sec, reading...271MB/sec
======== Wednesday, March 11, 2009 3:24:30 PM PT, volume "OS" (74.2GB) =======
----------------- Averages for "OS" (512MB/start, 1 iteration) -----------------
Chunk Size Write MB/sec Read MB/sec
256K 72.8 204
512K 76.9 228
1MB 75.3 227
2MB 77.5 254
4MB 79.1 263
8MB 80.9 269
16MB 77.7 266
32MB 79.7 270
64MB 76.1 180
128MB 77.5 269
256MB 79.7 271
Command "run-sequential-suite" executed in 96.68 seconds.
bash-3.2$ disktester run-sequential-suite User
DiskTester 2.0 (C) 2003-2006 diglloyd, Inc. All Rights Reserved
=> Allocating maximum size contiguous file on "User" (837.4GB)...741.1GB (88.5% of volume size)
NOTE:
(1) Contiguous space equal to 88.5% of volume "User" was allocated. Depending on the location of the contiguous space (which disktester cannot determine), TOP SPEED MIGHT BE AS MUCH AS 9.2% FASTER (worst case, sequential). To avoid this ambiguity, test a freshly-formatted volume.
=> Using test size of 512MB at start (0%), within a 741.1GB test file.
Chunk Size 256K, test area start: writing...209MB/sec, reading...261MB/sec
Chunk Size 512K, test area start: writing...292MB/sec, reading...324MB/sec
Chunk Size 1MB, test area start: writing...331MB/sec, reading...332MB/sec
Chunk Size 2MB, test area start: writing...343MB/sec, reading...325MB/sec
Chunk Size 4MB, test area start: writing...348MB/sec, reading...331MB/sec
Chunk Size 8MB, test area start: writing...348MB/sec, reading...334MB/sec
Chunk Size 16MB, test area start: writing...349MB/sec, reading...338MB/sec
Chunk Size 32MB, test area start: writing...353MB/sec, reading...338MB/sec
Chunk Size 64MB, test area start: writing...357MB/sec, reading...345MB/sec
Chunk Size 128MB, test area start: writing...331MB/sec, reading...346MB/sec
Chunk Size 256MB, test area start: writing...353MB/sec, reading...343MB/sec
====== Wednesday, March 11, 2009 3:26:23 PM PT, volume "User" (837.4GB) ======
---------------- Averages for "User" (512MB/start, 1 iteration) ----------------
Chunk Size Write MB/sec Read MB/sec
256K 209 261
512K 292 324
1MB 331 332
2MB 343 325
4MB 348 331
8MB 348 334
16MB 349 338
32MB 353 338
64MB 357 345
128MB 331 346
256MB 353 343
Command "run-sequential-suite" executed in 38.09 seconds.
bash-3.2$