Advice: Choice between 2 partitioning/dualboot schemes

500gb HDD, reported size ~465gb. Dual booting with XP 32 and Arch64
Option 1:
100gb for XP, rest of the disk is ext4 with a 1 or 2 gig swap at the end.
Option 2:
100gb for XP, big chunk of NTFS for all shared media (documents, music, movies, pictures), 50gb ext4 partition for linux, 1-2 gig swap.
Option 3:
Explanation:
Basically I want to be able to seamlessly access my files and folders no matter what happens. Some things are easier from XP to do on a whim, and obviously there are quite a few programs that I like to be able to use that are windows only. Most of the issue is with speed in the event of a problem. Example: my gf and I wanted to watch a movie on my big screen and i wanted to output via svideo. I hadnt bothered setting up any x.org profiles or putting in an entry for it in my xorg.conf. I tried mucking about with nvidia's settings to no avail, the dual screen option was constantly screwing up and drawing windows where there was no screen space. If i had that windows partitoin sitting around, i could just copy the file over and use windows for my 1.5 hours or so and call it a day.
Another example: printing documents is a pain in the ass. My printer has, for some reason, a very finicky time in linux. ive tried for a few months to figure it out but to no avail. half the times i need to print i have to copy my file over to a usb drive, go to a windows laptop, and print from there.
So I'm wondering, should I try this NTFS method to keep everything seamless no matter what OS im using or should I just do option 1 considering I end up using linux reliably for all but about 5% of the time? Keep in mind that I treat linux as my "project" OS, and mess around with everything a LOT just for sh*ts and giggles, so I definately like the comfort of having XP as a plan C or D.

In my experience,
- 16GB is plenty for Windows XP (excluding games installs),
- 20GB should be good for Arch (I've had a 12GB root partition for 8 months and just increased it to 20GB yesterday, but I actually plan to use less than 10GB of it on my new computer because I don't need to build kernels anymore and plan to backup pacman cache pkgs to another drive.)
- NTFS is fine for stuff like music and video and probably anything else (except Linux programs.)
- Swap is useless under Linux if you have 1GB of ram or more (or even 512MB if you're using a light DE.)
Edit: Maybe swap is not so useless in fact, since yesterday meld (a graphical diff tool) made the OOM killer kill all my programs when it used 1.5GB of RAM for comparing two directories... But then it depends on what programs you want to run.
Don't think too much about it anyway, since with gparted you can easily resize partitions (both NTFS and ext4.)
Last edited by stqn (2010-11-18 00:25:44)

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Partition Map Schemes: HFS+ and FAT32 partitions with OSX and Windows

OK so I know this question has been practically beaten to death, but I keep finding conflicting information. I am using a 2011 MacBook Pro, on which I will set up Windows through Boot Camp. I recently purchased a 750 GB WD external hard drive to use with time machine for a backup on my Mac. However, I also need to be able to use part of this for Windows files. SO.. I intend to use the HFS+ partition for the the Mac (500GB) and create a FAT 32 partition (250GB) to use for backing up windows files (using it for solely computer modeling and need to be able to transfer/share files with Mac users who use Parallels as well as copying to PC desktops). My question is what to use as the partition map scheme. I have heard that when using these two partition types, a Master Boot Record is needed (so Windows can recognize the FAT32 partition) and also that a GUID partition map is required for use with time machine, meaning windows would no longer be able to read the FAT32 partition. Is there a way to reconcile this? Either using Time Machine with HFS+ partition that is set to MBR or uisng FAT32 on Windows with a GUID partition map? Also if I were to use Parallels (with a GUID setup) instead of Boot Camp, could that be the way to save the windows files to the FAT32 Partition and avoid problems with Time Machine not working with MBR? Thanks for any expertise, as I have heard that both setups that I have mentioned both will work and both will not work. Any experience with a similar situation?

Wow. Thanks for the extremely quick responses. Just for a few points of clarification.. I'm a complete newb at backing up strategies.
Steve, you would recommend to not backup files from my Mac OSX and files from Windows (also on my Mac) on the same drive, correct?
I appreciate the strategy of using it only as a backup, that makes quite a bit of sense. However, if I want to only backup my OSX files, and also store (solely as backup copies) say, a number of computer models (Rhino, Revit, etc.) that were created in Windows programs (not needing to store the entire Windows disk), would it not make sense to store these on the same drive in a different partition, creating the need for two different partition formats? And if I were to do this, maybe I should use NTFS instead of FAT32 (and reformat to GUID since that seems to be a standard for Apple and Windows 7 recognizes it..?) to keep them completely separate since the computer model files cannot be opened unless running the Windows programs.
How do you use your drive with HFS+ and NTFS if not for backups? I will not need to access the HFS+ backup files in Windows, nor need to access files from an NTFS partition in OSX, so that seems to simplify things in that, at least at the moment, I will not need any Paragon software.
Currently my drive is partitioned as HFS+ and FAT32 as MBR, with the HFS+ partition set up with Time Machine. It appears to be successful, I see my files in Mac HD -> "users" and all my docs, desktop items, etc. are listed. Seems that there is in fact no limit on TM's use of MBR maps, or else it is way above 160GB.
Third, are you using CarbonCopyClone in place of Time Machine or in addition to it? If in addition would it create the bit-wise clone on the same HFS+ partition as TM is backing up to? Or a separate drive? I'd like to only have one external that I am backing up to for simplicity's sake. I've never used TM before, so this is all new to me. Also, I suppose I have been missing the distinction between storing copies of files, and making a complete backup of a disk image... just now realizing the difference. Thanks so much.

Performance between two partitionned tables with different structure

Hi,
I would like if there is a difference between two partitionned tables with different structure in term of performance (access, query, insertions, updates ).
I explain myself in detail :
I have a table that stores one value every 10 minutes in a day (so we have 144 values (24*6) in the whole day), with the corresponding id.
Here is the structure :
| Table T1 |
+ id PK |
+ date PK |
+ sample1 |
+ sample2 |
+ ... |
+ sample144 |
The table is partionned on the column date, with a partionned every months. The primary key is based on the columns (id, date).
There is an additionnal index on the column (id) (is it useful ?).
I would like to know if it is better to have a table with just (id, date, value) , so for one row in the first table we'll have 144 rows in the future? table. The partition will already be on the columns (id, date) with the index associated.
What are the gains or loss in performance with this new structure ( access, DMLs , storage ) ?
I discuss with the Java developers and they say it is simpler to manage in their code.
Oracle version : Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
Thanks & Regards
From France
Oliver
Edited by: 998239 on 5 avr. 2013 01:59

I mean storage in tablespaces and datafiles on disk.
Can you justify please and give me concrete arguments why the two structures are equivalent ( except inserting data in T(id, date,value))
because i have to make a report.i didnt say any thing like
two structures are equivalent ( except inserting data in T(id, date,value)i said
About structure : TABLE1(id, date, value) is better than TABLE1(id, date, sample1, .... sample144)because
1) oracle has restriction for numbers of column. Ok you can have 144 columns now but for future if you must have more than 1000 columns , what will you do?
2) Restrictions on Table Compression (Table compression is not supported for tables with more than 255 columns.)
3) store same type values on diffrent columns is bad practise
http://docs.oracle.com/cd/B28359_01/server.111/b28318/schema.htm#i4383
i remember i seen Toms article about this but now i cant find it sorry ((( if i found i will post here

How to exclude a partition from schema mode export?

I am using Oracle 10g Data Pump Export utility expdp. What I am trying to do is to export a single schema, except for a certain partition P in table T.
I have tried:
expdp user/pass@db dumpfile=... logfile=... exclude=table:" = 'T:P' "
(please ignore the OS specific text escaping issue)
It doesn't work. The whole table T gets exported.
Is there a way to exclude partitions from schema mode export?
If not, is there a way I can achieve the same with DBMS_DATAPUMP API?
Edited by: 950367 on 2-Aug-2012 10:42 AM

Try “QUERY” Data Pump Export parameter. Unless your partition is a hash partition, you should be able to constrict a where clause that gets you all records in the table, except the records for the partition you want to exclude.
For instance if you want to exclude a range partition (between 100 and 200) on the col1 column you should put something like this:
QUERY= USR.TAB:”WHERE COL1 < 100 OR COL1 > 200”This approach would export the partition definition though.
Iordan Iotzov
http://iiotzov.wordpress.com/
Edited by: Iordan Iotzov on Aug 2, 2012 10:55 AM

"GUID partition table scheme" Can't install snow leopard on my mbp.

I have a mbp that is partitioned as half mac, half XP. I put in the snow leopard CD and came up with an error that said I could not istall snow leopard because my partition did not fit the "GUID partition table scheme". I followed the menues to the partition section of the disk utility. From there, I don't know what to do. I can't click on the "options" button to change to the GUILD thing. Do I need to repartition my entire mbp? Will this erase my other partition? And will it delete all my data? Any suggestions on what to do???

GUID partition table (GPT) or map is a set of instructions at the very begining of a storage drive to tell the hardware what partitions and formats are where on the drive.
A Intel Mac now requires a GPT to boot OS X as it uses EFI (Extensible Firmware Interface) which is a software firmware in a hidden EFI partition on the boot drive designed originally for copy protection by Intel. EFI loads into memory before OS X does, which can be seen if you have verbose mode activated upon boot time.
Setting up the boot drive with a GUID Partiton table WILL require backing up of all data off the machine and a complete erasure of ALL partitions on the drive, which includes ALL data, programs, operating systems and files not backed up off the machine previously.
Since a partition map is basically road directions, when it's destroyed so does go the partitions.
Also since you will be fresh installing 10.6, your free iLife won't tag along,, however you can erase/install 10.5 first then upgrade to 10.6 (no BootCamp) and that shoudl work.
Unfortunatly Mac's only now support Windows 7 in Bootcamp, however Windows 7 Pro (and above) will run XP programs natively or via free virtual machine XP downloaded from Microsoft, however since it's really not native, 3D games etc likely won't run very well.
If your not familiar or willing to take a chance, then I suggest you have someone else upgrade that machine.
https://discussions.apple.com/community/notebooks/macbook_pro?view=documents

How do I get my mac partition to use GUID partition Table Scheme?

I just bought the upgrade for Mountain Lion on my Macbook pro (Mac OS X 10.6.8). I went to install it and i had partitioned my internal harddrive with bootcamp to run windows 7. I went to select the Macintosh partition and it says that disk does not use the GUID partition Table scheme, and it will not let me select it for the upgrade. It says I have to use Disk Utility but I cant seem to figure out how to get it so I can upgrade it to mountain lion. Please help and thank you for your time
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Bonjour is built-in to OS X. No download is needed.
Safari has a Bonjour browser which you can activate by opening Safari Preferences, selecting Advanced and enabling one of the Bonjour entries to add a Bookmark. If you then select the Bookmark, all devices on your local network that are advertising themselves with Bonjour will be shown.
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In Firefox 3.6.16, for pdf files, I have a choice between using Preview or asking whether to save; what happened to the choice between Preview or save?

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Check the setting in Tools > Options > Applications
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Choice between UPK in-application help and standard EBS help

Hi,
We are on a EBS 11.5.10 project, implementing UPK.
We got UPK in-application help working; changed custom.pll, set the profile option, everything fine.
Now we would like the users to have the choice between UPK help (default) and standard EBS help.
Therefore we opened the In-Application Support Player Configuration, and created a new Tab:
Type: Oracle E-Business Suite help
Tab Text: EBS help
URL: ?
Whatever we put in the URL, it won’t display the standard EBS context sensitive help. We can see the ‘EBS help’ tab when selecting ‘window help’ in the application but the page is blank or shows an error message.
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Oracle Belgium

Hi,
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2 Different Partition Map Scheme's for one external hard drive

Is it possible to have one external hard drive with 2 different Partition Map Scheme's?
One of them will be used to externally boot tiger on a powerpc, and the other for use on my macbook pro?

And this drive is currently not partitioned I take it ?
You need to make a backup of the data on the drive then partition it, the first partition must be set under Disc Utility / Partition / Options as Mac GUI Bootable so it installs the drivers, then install Tiger onto the first partition and move your current data back onto the second one.
You will then be able to Boot Tiger on the older PowerBook by holding down 'option' at start up, if you just have it connected to the MacBook Pro and start up normally then it will appear as two volumes on your Desktop, the Tiger Boot Volume and your Data Volume.

This disk doesn't use the GUID Partition table scheme.

When I Install the Lion. It is stuck.
Lion This disk doesn’t use the GUID Partition table scheme.Use disk Utility to change the partition scheme.Select the disk,choose the Partition tab,select the Volume Scheme and then click Options.
The last step has problem.
I can not click Options.

In order to repartition the startup drive you will have to boot from your Snow Leopard DVD, select Utilities and then Disk Utility. YOU MUST ERASE YOUR DISK TO CHANGE THE PARTITION TABLE. The good news is that I see you have a Time Machine backup. Make sure that your backup is current before you erase your startup disk.
Even before doing this, save a copy of the Lion installer (it is in the Applications folder) onto an external device. Your external hard drive is a good spot; it won't interfere with your Time Machine backup. This will prevent you from having to download the installer again.
The easiest way to proceed after making sure your Time Machine backup is current, saving a copy of the Lion installer, and repartitioning your startup disk, is to reinstall Snow Leopard on your newly partitioned disk. This will take a little longer but it is simple and is fully supported by Apple. Once that is done and you are running Snow Leopard on your startup disk again, run the Lion installer from whereever you saved it, and then restore your files and settings from your Time Machine backup during the install process.
There is an unsupported procedure for making a bootable Lion DVD, but it is more complex and is not supported by Apple. If you are uncomfortable with any of this and have access to an Apple Store, make an appointment at the Genius Bar and they can help you through the process.

Lion This disk doesn't use the GUID partition table scheme

Hi I have downloaded and began running the installation but it says "This disk doesn't use the GUID partition table scheme", any ideas?! Running latest version of OSX 10.6.8
Thanks in advance!

ok, sorry if I offended you for wrong.
I did not knew Apple ships MBR partitioned disks or has official support for doing so. I always see Windows-PCs with that scheme ( Linux supports mbr and guid just like osx ) .
Of course I know that Disk Utility offers three options : GUID or MBR or Apple partition map for ppc devices.
Lion needs GUID, so a reformat is absolutely necessary for those that have one of the others.
Again sorry.

Can't install OSX Mountain Lion, on the disk selection screen i cant select the Macintosh HD to install OSX giving a message (This disk cannot be used to start up your computer).only have one disk to select and my partition map scheme is GUID partition

just bough OSX Mountain Lion, my laptop operating with v10.6.8. Can't install OSX Mountain Lion, on the disk selection screen i cant select the Macintosh HD to install OSX giving a message (This disk cannot be used to start up your computer).only have one disk to select and my partition map scheme is GUID partition table. 24.44gb disk available.

Verify your computer can run Mountain Lion:
Upgrading to Mountain Lion
To upgrade to Mountain Lion you must have Snow Leopard 10.6.8 or Lion installed. Purchase and download Mountain Lion from the App Store. Sign in using your Apple ID. Mountain Lion is $19.99 plus tax. The file is quite large, over 4 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
     OS X Mountain Lion - System Requirements
       Macs that can be upgraded to OS X Mountain Lion
         1. iMac (Mid 2007 or newer) - Model Identifier 7,1 or later
         2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) - Model Identifier 5,1 or later
         3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later
         4. MacBook Air (Late 2008 or newer) - Model Identifier 2,1 or later
         5. Mac mini (Early 2009 or newer) - Model Identifier 3,1 or later
         6. Mac Pro (Early 2008 or newer) - Model Identifier 3,1 or later
         7. Xserve (Early 2009) - Model Identifier 3,1 or later
To find the model identifier open System Profiler in the Utilities folder. It's displayed in the panel on the right.
Open Disk Utility and verify the drive is partitioned using GUID and formatted Mac OS Extended, Journaled. If it is then do this:
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
Now try installing Mountain Lion.

HT5225 "This disc does not use the GUID Partition Table Scheme...". I keep getting this message when I try to install OSXLion. It has something to do with a repair Apple performed last year. I use a 17" MacBookPro. Any suggestions?

"This disc does not use the GUID Partition Table Scheme. Use Disc Utility to change the partition scheme". I keep getting this message when I try to install OSX Lion so that I can upgrade my 17" MacBookPro to move to iCloud. My harddrive was replaced last year by Apple because of a fault by the manufacturer and I think this is the cause of the problem. What can I do so that I don't lose my content.

When you click the partion tab. There is option on the bottom of the window. Click on that there there are these options.

ADF BC: Choosing between two identical DB schemas on application startup

Hi,
We want to provide users with capability to choose between two identical db schema.
Anu idea how to do this ?

Cvele wrote:
Thanks a lot ! My pleasure.
One question: datasource name entered by the user (on the login form) is a JDBCDataSource property value for the Application module Configuration (which connect trough JDBC DataSource), correct ?Yes.
If so, then, we still must define two different sets of App Module Configurations, one for each DB schema, correct ?No. I'm not suggesting that you implement your UI like the demo that I forwarded. It might not be appropriate for your user to type in the datasource name, but the same code would be required to make the datasource name change work. Rather than getting the datasource name from the HTTPRequest and setting on the session where the custom sesison cookie impl and env info provider access you, for your solution that datasource value might come from some other place that the end-user doesn't directly type in.
Otherwise:
1. we cannot have two different datasource names, correct ?The example I forwarded should allow you to enter different JNDI names, so those would be different datasources.
2. in case of one Configuration – what is a way to define (at deployment time) username/password for each of those two schemas ? Is this correct ?The username/password information is encapsulated inside the Java EE container when you define the datasource. The application doesn't know that information and doesn't have to provide it when you are using a JDBC datasource by JNDI name.
On the other hand, what confuses me, is a fact that you say:
“You wouldn't use different configurations” And really, you example attached to me have just one App module Configuration (datasource name = jdbc/scottDS), which connect through dataSource.
Wondering what a user can enter as datasource name, except jdbc/scottDS ?I forget whether in my example I configured another datasource, but the user could enter the name of any available JNDI name for the datasource on the Java EE container.
Again, I don't suggest necessarily that you let the end-user type it in, that was just how I built the demo since I quickly evolved it from the other dynamic credentials demo that accepted the username and password from the end-user.

Making choice between socket and RMI

I never use RMI, but i am familiar to socket programming. i want to write an online game, I know that use RMI will easy than use socket, could anyone tell me what factors will affect the choice between using socket and RMI if don't consider which one i am familiar ?
thanks
jacky

I would consider the amount of traffic your online game is going to be generating. Obviously, if the traffic is the bottleneck, you will want to optimize it as much as possible.
I can see that if you are familiar with sockets and socket programming, where this is very appealing because after all, you can't get much faster than raw sockets. Also, the Java APIs around sockets are much easier than the equivalent BSD Socket C/C++ libraries.
Still, RMI has much more to offer.
o It is relatively easy to set up a connection
o exceptions will be thrown when problems occur
o serializing classes is so easy it's laughable
o If performance becomes an issue, you can (as the previous poster suggests) create your own custom socket factory which optimizes the used bandwidth. Options here include compression if you have the CPU cycles to spare.
o There are mechanisms in place for working RMI over firewalls
Many of the things that RMI offers, you might find yourself re-writing in your own socket-based API. Personally, I would choose RMI.

Advice: Choice between 2 partitioning/dualboot schemes

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