With regards to your message at 02:37 AM 8/21/02, Mikael Abrahamsson. Where
you stated:
>I am considering a 3ware 7500-12 (12 channel IDE raid controller) and 12
>120 gig drives in a single large RAID5. Am I correct that Linux (latest
>Redhat 7.3 shipped 2.4.18 kernel) can handle devices up to 2 terabyte and
>that this raid5 (1320 gig) would work as expected as one single file
>system (ext3) ? Anyone actually have something similar up and running and
>can verify that it works?
It works just great.
The 3Ware have the new ATA addressing and handle large drives just fine.
Actually the 120GB does not need this newer addressing. Only drives over
128GB need it.
We use the WD and also the Maxtor 160GB with 3Ware.
You will get a RAID volume with a formatted capacity of about 1.221TB
One thing I can point out is that the "slower" Maxtor 5400rpm drives
actually produce very similar performance results compared to the "faster"
7200rpm models. While they spin slower, the track data density is very
high, and this seems to make up for the slower spin rate to a great degree.
Using a set of 160GB, 5400 rpm drives we get very similar performance to
the 7200rpm WDs.
Using the 160GB drives we build 16 drive RAID 5 arrays (using 2 of the
3Ware cards, and can build a 2TB partition and if we use all drive, another
311MB for a second partition.
Works great.
Here's a bonnie test on 8 of the WD1200-JB, using different options. Read
the inline notes by the bonnie++ tests for info.
Note that we are using a 4GB file size in the bonnie++ tests, so as to
avoid artificially high readings due to OS buffers, drive cacheing, etc.:
Hardware:
SuperMicro P4DL6 Motherboard
1024 MB of RAM
3ware 7850 RAID Controller
Dual P4 Xeons 2GHz
8 x 120GB Western Digital c/w 8MB Cache WD1200-JB
raidtab file:
raiddev /dev/md2
raid-level 5
nr-raid-disks 8
chunk-size 64k
persistent-superblock 1
nr-spare-disks 0
device /dev/sda3
raid-disk 0
device /dev/sdb2
raid-disk 1
device /dev/sdc2
raid-disk 2
device /dev/sdd2
raid-disk 3
device /dev/sde2
raid-disk 4
device /dev/sdf2
raid-disk 5
device /dev/sdg2
raid-disk 6
device /dev/sdh2
raid-disk 7
raiddev /dev/md0
raid-level 5
nr-raid-disks 8
chunk-size 64k
persistent-superblock 1
nr-spare-disks 0
device /dev/sda9
raid-disk 0
device /dev/sdb9
raid-disk 1
device /dev/sdc9
raid-disk 2
device /dev/sdd9
raid-disk 3
device /dev/sde9
raid-disk 4
device /dev/sdf9
raid-disk 5
device /dev/sdg9
raid-disk 6
device /dev/sdh9
raid-disk 7
raiddev /dev/md1
raid-level 5
nr-raid-disks 8
chunk-size 64k
persistent-superblock 1
nr-spare-disks 0
device /dev/sda8
raid-disk 0
device /dev/sdb8
raid-disk 1
device /dev/sdc8
raid-disk 2
device /dev/sdd8
raid-disk 3
device /dev/sde8
raid-disk 4
device /dev/sdf8
raid-disk 5
device /dev/sdg8
raid-disk 6
device /dev/sdh8
raid-disk 7
raiddev /dev/md4
raid-level 5
nr-raid-disks 8
chunk-size 64k
persistent-superblock 1
nr-spare-disks 0
device /dev/sda6
raid-disk 0
device /dev/sdb6
raid-disk 1
device /dev/sdc6
raid-disk 2
device /dev/sdd6
raid-disk 3
device /dev/sde6
raid-disk 4
device /dev/sdf6
raid-disk 5
device /dev/sdg6
raid-disk 6
device /dev/sdh6
raid-disk 7
raiddev /dev/md5
raid-level 5
nr-raid-disks 8
chunk-size 64k
persistent-superblock 1
nr-spare-disks 0
device /dev/sda7
raid-disk 0
device /dev/sdb7
raid-disk 1
device /dev/sdc7
raid-disk 2
device /dev/sdd7
raid-disk 3
device /dev/sde7
raid-disk 4
device /dev/sdf7
raid-disk 5
device /dev/sdg7
raid-disk 6
device /dev/sdh7
raid-disk 7
raiddev /dev/md3
raid-level 5
nr-raid-disks 8
chunk-size 64k
persistent-superblock 1
nr-spare-disks 0
device /dev/sda5
raid-disk 0
device /dev/sdb5
raid-disk 1
device /dev/sdc5
raid-disk 2
device /dev/sdd5
raid-disk 3
device /dev/sde5
raid-disk 4
device /dev/sdf5
raid-disk 5
device /dev/sdg5
raid-disk 6
device /dev/sdh5
raid-disk 7
Test 1: Command Line: bonnie++ -d /data -s 4g -r 1024 -u root > /root/bonoutb
* This test had the driver from the 7.3 RedHat Install and the RAID was
still resyncing after the OS install.
*3ware Storage Controller device driver for Linux v1.02.00.020
Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
dynamic-188.hard 4G 15554 99 76414 98 49839 52 22177 99 155182 53
373.9 2 ------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec
%CP /sec %CP
16 2101 97 +++++ +++ 29801 100 1878 97 +++++
+++ 3738 98
dynamic-188.harddata.net,4G,15554,99,76414,98,49839,52,22177,99,155182,53,373.9,2,16,2101,97,+++++,+++,29801,100,1878,97,+++++,+++,3738,98
Test3: Command line: bonnie++ -d /data -s 4g -r 1024 -u root > /root/bonoutd
* This test is the stock driver from the 7.3 RedHat Install and the RAID is
done resyncing.
*3ware Storage Controller device driver for Linux v1.02.00.020
Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
dynamic-188.hard 4G 17293 99 77746 99 51494 54 22826 98 157093 50
393.7 3 ------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec
%CP /sec %CP
16 2081 97 +++++ +++ 32012 99 2200 99 +++++
+++ 5846 100
dynamic-188.harddata.net,4G,17293,99,77746,99,51494,54,22826,98,157093,50,393.7,3,16,2081,97,+++++,+++,32012,99,2200,99,+++++,+++,5846,100
Test4: Command line: bonnie++ -d /data -s 4096 -r 1024 -u root
* This test is the stock driver from the 7.3 RedHat Install and the RAID is
done resyncing.
*3ware Storage Controller device driver for Linux v1.02.00.020
Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
dynamic-188.hard 4G 17324 99 82418 99 50897 55 22718 99 154522 46
389.9 2 ------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec
%CP /sec %CP
16 2075 99 +++++ +++ 32095 99 2202 98 +++++
+++ 5848 100
dynamic-188.harddata.net,4G,17324,99,82418,99,50897,55,22718,99,154522,46,389.9,2,16,2075,99,+++++,+++,32095,99,2202,98,+++++,+++,5848,100
Test5: Command line: bonnie++ -d /data -s 4096 -r 1024 -u root
* This test is with the newest driver available from 3ware.
*3ware Storage Controller device driver for Linux v1.02.00.025
Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
dynamic-188.hard 4G 17299 99 82519 99 51073 54 22969 99 158657 46
394.5 2 ------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec
%CP /sec %CP
16 2078 98 +++++ +++ 31989 99 2139 98 +++++
+++ 5129 99
dynamic-188.harddata.net,4G,17299,99,82519,99,51073,54,22969,99,158657,46,394.5,2,16,2078,98,+++++,+++,31989,99,2139,98,+++++,+++,5129,99
Test6: Command line: bonnie++ -d /data -s 4g -r 1024 -u root
* This test is with the newest driver available from 3ware.
*3ware Storage Controller device driver for Linux v1.02.00.025
Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
-Per Chr- --Block-- -Rewrite- -Per Chr- --Block--
--Seeks--
Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
dynamic-188.hard 4G 17465 99 78499 99 50943 53 22833 98 150570 44
384.8 2 ------Sequential Create------ --------Random
Create--------
-Create-- --Read--- -Delete-- -Create-- --Read---
-Delete--
files /sec %CP /sec %CP /sec %CP /sec %CP /sec
%CP /sec %CP
16 2083 98 +++++ +++ 31929 99 2158 99 +++++
+++ 5029 98
dynamic-188.harddata.net,4G,17465,99,78499,99,50943,53,22833,98,150570,44,384.8,2,16,2083,98,+++++,+++,31929,99,2158,99,+++++,+++,5029,98
With our best regards,
Maurice W. Hilarius Telephone: 01-780-456-9771
Hard Data Ltd. FAX: 01-780-456-9772
11060 - 166 Avenue mailto:maurice@harddata.com
Edmonton, AB, Canada http://www.harddata.com/
T5X 1Y3
2.3TB RAID5 NAS server - dual AthlonMP CPU, Linux, $10,995 CAD / $6850 USD
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