Nominal configuration for boot drive and internal RAID setup

Hello, I'd appreciate some advice on the following please.
I'm planning the build of a Mac Pro to act mainly as a photo editing workstation.
Considering the following disc setup:
Bay 1. 500GB with two partitions - 150GB for OS X and remaining for applications
Bay 2. 250GB XP/Vista for occasional use. All Windows apps/data quarantined on this disk.
Bays 3 and 4. 2x 500GB RAID0 (backed up externally) for data and workspace.
WRT RAM, I've read that 4 matched DIMMs in the same riser is the optimal config, so looking at 4x 1GB.
I'd be grateful for any comments as to whether I'm on the right track here.
Thanks
Ben
Mac Pro Mac OS X (10.4.10)

I set up a similar configuration for photo editing. First, partitions are not as useful as they were in the pre OS X era. Just load your OS and all applications on the same drive as there is no benefit, as far as I know, to separating them into partitions. Second, your 4 X 1GB RAM should be split between the two risers, not on the same riser. Put two DIMMs in the first two slots of each riser. 4 X 1GB hits a sweet spot in the cost/benefit analysis as long as you don't need more than 4GB. I use Lightroom extensively and 4GB is plenty.

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Hi,
There was a serious BIOS/UEFI problem with that SSD . Perhaps this thread will save you some headaches. Someone is recomending shutting off Rapid Boot in the setup, which would probable mean little with a SSD, anyway.
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Hi,
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Hi Shankar,
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In case you don't have access to MOS :
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JDK : 1.6.0_38
ORACLE :
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Problems stting up RAID (Mirror) for boot drive.

I have a Mac that I want to setup mirroring on the boot drive (it's running Mac OS X Server and once I get everything going I need to minimize downtime).
Since you can't move a drive with data into a raid set I first cloned the boot drive to a 3rd drive, booted off that drive, then set the two 80gb drives up as a mirror. after cloning the data from drive #3 back to the now mirrored pair I can't boot off the mirror.
I've tried using both the Startup Disk preferences and also the bless command to mark the raid as the device I want to boot from but it doesn't recognize it as a bootable device.
What do I need to do to make the raid bootable?
thanks,
Bill

The drive I want to boot off (the mirror) is "Macintosh HD"
The temporary drive it's running on now is "Macintosh HD 0"
Both drives show up in the startup items preference panel, I have "Macintosh HD" selected. When I hit restart it fails to recognize it as bootable and fails back to the other one.
I'm not sure which folder you want the permissions set on. Here's what it looks like right now.
<pre>
viking:~ user1$ ls -l /Volumes/
total 8
drwxrwxr-t 32 root admin 1190 May 19 01:16 Macintosh HD
lrwxr-xr-x 1 root admin 1 May 19 01:19 Macintosh HD 0 -> /
viking:~ user1$ ls -la /
total 18275
drwxrwxr-t 32 root admin 1190 May 19 01:19 .
drwxrwxr-t 32 root admin 1190 May 19 01:19 ..
-rw-rw-r-- 1 administ admin 12292 May 18 09:15 .DS_Store
d-wx-wx-wt 2 root admin 68 May 18 01:50 .Trashes
-rw------- 1 root wheel 131072 Apr 24 11:38 .hotfiles.btree
-rw------- 1 root admin 1024 Apr 6 22:31 .rnd
dr-xr-xr-x 2 root wheel 128 May 19 01:19 .vol
drwxrwxr-x 38 root admin 1292 May 8 01:33 Applications
-rw-r--r-- 1 root admin 3584 May 19 00:19 Desktop DB
-rw-r--r-- 1 root admin 2 Apr 6 23:15 Desktop DF
drwxrwxr-x 3 administ admin 102 Apr 6 23:08 Groups
drwxrwxr-t 48 root admin 1632 Apr 14 00:59 Library
drwxr-xr-x 1 root wheel 512 May 19 01:20 Network
drwxrwxr-x 5 administ admin 170 Apr 7 00:43 Shared Items
drwxr-xr-x 4 root wheel 136 May 8 08:59 System
drwxrwxr-t 11 root admin 374 Apr 7 02:22 Users
drwxrwxrwt 4 root admin 136 May 19 01:19 Volumes
drwxr-xr-x 4 root admin 136 Apr 6 22:32 automount
drwxr-xr-x 40 root wheel 1360 Apr 6 23:26 bin
drwxrwxr-t 2 root admin 68 Jul 1 2006 cores
dr-xr-xr-x 2 root wheel 512 May 19 01:19 dev
lrwxr-xr-x 1 root staff 11 May 18 01:07 etc -> private/etc
lrwxr-xr-x 1 root admin 9 May 19 01:19 mach -> /mach.sym
-r--r--r-- 1 root admin 615584 May 19 01:19 mach.sym
-rw-r--r-- 1 root wheel 8557728 Feb 22 21:58 mach_kernel
drwxrwxrwx 2 administ admin 68 Apr 18 15:04 mnt
drwxr-xr-x 3 root wheel 102 Jul 25 2006 opt
drwxr-xr-x 6 root wheel 204 May 19 01:19 private
drwxr-xr-x 63 root wheel 2142 May 8 01:33 sbin
lrwxr-xr-x 1 root staff 11 May 18 01:26 tmp -> private/tmp
drwxr-xr-x 10 root wheel 340 May 1 23:10 usr
lrwxr-xr-x 1 root staff 11 May 18 01:48 var -> private/var
viking:~ user1$ ls -la /Volumes/Macintosh\ HD
total 18272
drwxrwxr-t 32 root admin 1190 May 19 01:16 .
drwxrwxrwt 4 root admin 136 May 19 01:19 ..
-rw-rw-r-- 1 administ admin 12292 May 19 00:56 .DS_Store
d-wx-wx-wt 3 root admin 102 May 19 01:20 .Trashes
-rw------- 1 root wheel 131072 Apr 24 11:38 .hotfiles.btree
-rw------- 1 root admin 1024 Apr 6 22:31 .rnd
dr-xr-xr-x 2 root wheel 68 May 18 13:19 .vol
drwxr-xr-x 38 root admin 1292 May 19 00:32 Applications
-rw-r--r-- 1 root admin 3584 May 19 00:19 Desktop DB
-rw-r--r-- 1 root admin 2 Apr 6 23:15 Desktop DF
drwxrwxr-x 3 administ admin 102 Apr 6 23:08 Groups
drwxrwxr-t 48 root admin 1632 Apr 14 00:59 Library
drwxr-xr-x 2 root wheel 68 May 18 13:45 Network
drwxrwxr-x 5 administ admin 170 Apr 7 00:43 Shared Items
drwxr-xr-x 4 root wheel 136 May 8 08:59 System
drwxrwxr-t 11 root admin 374 Apr 7 02:22 Users
drwxrwxrwt 2 root admin 68 May 18 13:19 Volumes
drwxr-xr-x 4 root admin 136 Apr 6 22:32 automount
drwxr-xr-x 40 root wheel 1360 May 19 01:13 bin
drwxrwxr-t 2 root admin 68 Jul 1 2006 cores
drwxr-xr-x 2 root admin 68 May 19 01:16 dev
lrwxr-xr-x 1 root admin 11 May 19 01:16 etc -> private/etc
lrwxr-xr-x 1 root staff 9 May 18 13:45 mach -> /mach.sym
-r--r--r-- 1 root staff 615584 May 18 11:34 mach.sym
-rw-r--r-- 1 root wheel 8557728 Feb 22 21:58 mach_kernel
drwxrwxrwx 2 administ admin 68 Apr 18 15:04 mnt
drwxr-xr-x 3 root wheel 102 Jul 25 2006 opt
drwxr-xr-x 6 root wheel 204 May 18 11:34 private
drwxr-xr-x 63 root wheel 2142 May 19 01:13 sbin
lrwxr-xr-x 1 root admin 11 May 19 01:16 tmp -> private/tmp
drwxr-xr-x 10 administ staff 340 May 1 23:10 usr
lrwxr-xr-x 1 root admin 11 May 19 01:16 var -> private/var
</pre>
MacBook Pro 2.0ghz, 2gb ram / MacMini 1.83, 2gb ram Mac OS X (10.4.9) Compaq DL380 (Gentoo Linux). Tatung U10 (Sparc, Solaris)
MacBook Pro 2.0ghz, 2gb ram / MacMini 1.83, 2gb ram Mac OS X (10.4.9) Compaq DL380 (Gentoo Linux). Tatung U10 (Sparc, Solaris)

Best RAID configuration for storing Datafiles and Redo log files

Database version:10gR2
OS version: Solaris
Whis is the best RAID level for storing Datafiles and Redo log files?

Oracle recommends SAME - Stripe And Mirror Everything.
In the RAC Starter Kit documentation, they specifically recommend not using RAID5 for things like voting disk and so on.
SAN vendors otoh claims that their RAID5 implementations are as fast as RAID10. They do have these massive memory caches...
But I would rather err on the safer side. I usually insist on RAID10 - and for those databases that I do not have a vested interest in (other than as a DBA), and owners, developers and management accept RAID5, I put the lead pipe away and do not insist on having it my way. :-)

Mirrorerd boot drive and separate service partition - unsupported ?!?

Hello
i have setup my SL MacMini (2 internal HDs) in a way that I have splitt the harddrives into two parttitions and mirrored them.
Which is possible in the Installer (and even with Lion) . Which gives you the layout shown below. On the seperat partition are also all service data (Mail,Web,...).
From the beginning I had once per month one partition dropping out of the mirror. it was always the same partition/disk having issues.
It was no problem getting it back via: "diskutil appleraid repairmirror 5B12C7D9-89DC-4593-8BEB-28B3F6F6C5FA disk1s2".
As the frequency has gone up i decided to give the MacMini to AppleCare. They found that the motherboard had some issues and exchanged it. But they also mentioned that this way of setting up the drives is unsupported by Apple. You always have to use the full harddrives and mirror them.
Can anyone confirm this ?
For me this sounds stupid. Any process from a user filling up the the homedirectory will make the full system unusable.
Yours
Wieland
P.S.: By exchanging the motherboard the issue didnt go away.
[macmini:~] % diskutil list
/dev/disk0
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.1 GB   disk0
   1:                        EFI                         209.7 MB   disk0s1
   2:                 Apple_RAID                         120.1 GB   disk0s2
   3:                 Apple_Boot Boot OSX                134.2 MB   disk0s3
   4:                 Apple_RAID                         379.5 GB   disk0s4
   5:                 Apple_Boot Boot OSX                134.2 MB   disk0s5
/dev/disk1
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.1 GB   disk1
   1:                        EFI                         209.7 MB   disk1s1
   2:                 Apple_RAID                         120.0 GB   disk1s2
   3:                 Apple_Boot Boot OSX                134.2 MB   disk1s3
   4:                 Apple_RAID                         379.6 GB   disk1s4
   5:                 Apple_Boot Boot OSX                134.2 MB   disk1s5
/dev/disk2
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS mirror                 *379.5 GB   disk2
/dev/disk5
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS server                 *120.0 GB   disk5
[macmini:~] % diskutil appleraid list
AppleRAID sets (2 found)
===============================================================================
Name:                 server
Unique ID:            8FA04354-2C35-4A13-A7ED-FA74B3F8CE1C
Type:                 Mirror
Status:               Online
Size:                 120.0 GB (119999987712 Bytes)
Rebuild:              automatic
Device Node:          disk5
#   Device Node       UUID                                   Status
0   disk0s2           DA38BBE3-041C-402A-87EC-074FDE9800EC   Online
1   disk1s2           4D77F50D-48E8-4051-BEF4-0A42EED309E8   Online
===============================================================================
===============================================================================
Name:                 mirror_i
Unique ID:            FFEBF2F1-8718-41ED-8032-FD7BE5FA74A0
Type:                 Mirror
Status:               Online
Size:                 379.5 GB (379521794048 Bytes)
Rebuild:              automatic
Device Node:          disk2
#   Device Node       UUID                                   Status
0   disk0s4           57636927-E251-4443-901B-466242D5E4D0   Online
1   disk1s4           DF9D9DC3-C4FE-43D5-836A-5997F9AAD182   Online
===============================================================================

Everything I've seen about about professional apps and looking for extra speed suggests partitioning the boot drive to put your system on the outer, fastest part of the disk and separating your boot/apps and your data.
There was, or is, slightly conflicting info here:
http://macperformanceguide.com/
On the one hand, Lloyd discounted boot drive speed as a factor in day to day work, and emphasized putting DATA on the outer partition, particularly for scratch. However, once he tried a superfast solid state boot drive:
http://macperformanceguide.com/Mac-LightingFast.html
He was sold! Your set-up and purchases clearly indicate performance is your priority. With 4 1 TB drives in RAID, the extra space on the 300 raptor doesn't seem significant for extra data storage.
I looked hard and had trouble finding a definite recommendation for boot partition size or ratio, but 80 GB seems a ballpark number. You want a cushion. If you can guesstimate the potential size of your boot and apps, some of the speed junkies might be able to give you the optimal number. Nice set up, by the way.

External Boot drive and time machine?

Been away from the mac/s for awhile... Just recieved my new mac mini hooked up to an external drive, in this case a very nice mini stack V2 with 500GB and more importantly 7200RPM drive. When I first turned on Leopard I of course designated the external drive as my backup for time machine.
That done can I still use the external drive as a bootable drive? I want to gain the increase in performance from that hard drive by doing so.
If YES I just install my OS on to that drive and then once done select it as my boot drive in system preferences? Any help appreciated.

I'm not sure you would want to have a backup to the same drive you boot the system from, and Time Machine won't give you the option to select the same partition your boot copy of MacOS is in. You may be able to repartition the drive into two (or more) logical drives and do it that way, but realistically to get the best performance from the system you'd probably want to use the external not just as the boot drive, but also for data storage. That being so, you clearly wouldn't gain any real benefit backing up to the same drive even if you could do so, so you might perhaps instead designate the mini's internal drive for Time Machine use, or add a second external and designate that.

Using external hard drive as both a boot drive and time machine backup

My internal 1TB hard drive on my iMac is dead and I don't have the money to replace it at the moment.
I have everything backed up on an external 1TB drive using Time Machine. As a workaround for the time being,
Is there any way I can install the system on the external drive and use that as the boot drive without erasing the Time Machine
Backups? It seems to me I would have to have two partitions for the external drive, one for the system, and
one for Time Machine. But is there any way to add a partition without erasing the existing one with
Time Machine only on it?
Sorry if line breaks here are weird. Doing this from iPhone.

Neil , I have a mid 2010 27" imac running 10.6.8 and i want to install Lion , when i purchase Lion from app store will it give me any install options as I would like to be able to dual boot using SL and Lion , I have 500 gigs left on my 1 tb drive (should I do this) or would I be better of using an external bootable drive as I also want to use Ubuntu and or Linux down the line.
Any and all support , help and advice will be appreciated.
If you would like to e-mail me you can find it on my profile page.
Thanks

Boot HD and Internal HD Icons Dissapeared from Finder

I updated a clients system to 10.4.9 (Installed Tiger then the Combo updater) on a G5 Dual 2Gig and all worked fine for the first day, then the HD Icon for the Boot drive Vanished from the finder, it was still booting from this however, then some time Later the second internal drive did the same. The drives also do not appear in any finder windows either. Disk utility sees the drives and sees no problems. Any installers also see the drives. You can work like normal on any apps you just cannot see the Drives in the finder. Creating a new user shows the same problem so it must be system related. I have read some material on the web that describes the problem and poses some things to try (none of which solved the problem).
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thanks in advance
Simon L.

Simon
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Nominal configuration for boot drive and internal RAID setup

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