Two users (on the same Mac) using same RAID simultaneously?

O.K. I know you should never never ever connect two different Macs to the same RAID unless using Xsan. . .
How about connecting two users on the same Mac simultaneously?
In other words, can I have one user manipulating data on the RAID in the background while reading the data using a second user (on the same Mac)?
Thanks,
Ed

That depends on the application in question.
Since all the data requests are coming from the same Mac, you don't have the issues you would have if you had two different machines talking at the same time.
However, it now depends on whether the application(s) you're using supports file locks.
As long as the application that's manipulating the data properly locks the part of the file it's working on, and that the application you're using to read the file reads the locks and knows whether or not it's OK to use that part of the file, you should be OK.

Similar Messages

  • Can two users share the same iMac simultaneously?

    I have recently acquired several 2009 Mac "towers" (kind of new to Mac, here...  have patience...) and I'm trying to stretch the 20 computers I was given so it can service 40 students.  They all have 6gb of RAM, a couple of TB's of memory, fast processors and (from my understanding) can support two demanding users at one time.  They also have two network ports.
    Now, I'm not talking about using two monitors on one Mac, because I know how to do that.  I'm trying to have two totally separate users, with two different accounts on a network, logging in totally independently and drawing off of a similar network.  So, I'm basically trying to make it so we "split" one Mac so that two students can use one machine.
    I thought about partitioning the drive so that I can have two parallel installations of iOS, running independently of each other (not sure if that's possible) but then I wouldn't know how to connect the machine to the internet.  I know it has two different network ports but I'm not sure how to make them operate independently.  The students need to have their own login and should not be able to mess with the other student's items.
    I appreciate any and all tips or help.
    Thanks again!

    You can create as many individual user accounts on a Mac as you like. Then, any one or more of those users can remotely log in from another Mac and use that Mac as their own, simultaneously. Each account will remain separate from all others.
    However, since each user needs to have a Mac to do that, I'm not sure how you could effectively double the number of users as you describe.

  • Can two users on the same Mac sync contacts by using the same Apple ID in the iCloud settings?

    Can two users on the same Mac sync contacts by using the same Apple ID in the iCloud settings?

    Hi Barney,
    That's exactly what I want. I have a personal user and a business user on my MacBook Pro. I want both users to have the same contacts so if I add a contact while I'm logged into my personal user, it will show up when I'm logged into my business user. I want both contacts books to be exactly the same; like you said. So, I used my business user AppleID when I enabled iCloud for my personal user and I enabled iCloud for my business user with that Apple ID as well. For my personal user, I selected Contacts and Calendars to sync with iCloud. For my business user, I selected everything to sync with iCloud. The problem is... it didn't change anything. I restarted my computer to see if that would do anything but nothing happened. I'm not super savvy with Apple products, so maybe I'm completely confused.
    Hi Xeni,
    Thank you for your response, as well.
    KEW

  • Two users in the same Mac accessing one TimeCapsule

    Hi,
    How can i make two user accounts in the same Mac access simultaneously the same TimeCapsule?
    I've tried setting them to use accounts to connect to TimeCapsule as well as using a single password for TimeCapsule.
    But i keep having the same problem. When one user accesses the time capsule the other gets ejected or the TimeCapsule folder appears with a forbidden sign.
    What do i have to do?
    Please help.
    Thanks in advance

    I think i understand what is happening.
    Leopard mounts the TimeCapsule disk using mount_afp command and any disk mounted with mount_afp will automatically have as owner <user>:staff and read and write permissions only to the owner. All other users have access denied.
    (If anyone knows how to change the default permissions of mount_afp please reply!)
    If like me, you have two user accounts in the same Mac (lets say user1 and user2) and use fast user switching a lot like i do, since it is a family computer, you'll have serious problems since what happens is the following:
    1. Mount the Timecapsule in user1.
    2. Fast user switching to user2.
    3. The TimeCapsule will appear unmounted in user2
    4. Mount the TimeCapsule in user2.
    5. List the /Volumes folder and you'll see something like this
    drwx------ user1:staff /TimeCapsule
    drwx------ user2:staff /TimeCapsule-1
    No problem... I can live with having two mounts for the same network disk.
    The problem is the following...
    6. Fast user switch to user1 again.
    7. Open a finder window
    8. On the left the TimeCapsule is listed as a network drive (as expected) and is shows as mounted!
    However... The association has changed and once i click the TimeCapsule icon in the sidebar it now points to /Volumes/TimeCapsule-1 and therefore user1 has permission denied.
    9. I opened a terminal window with user1 and went to /Volumes/TimeCapsule and everything was ok!.
    So the conclusion is... the finder window sidebar TimeCapsule is pointing to a Volume it shouldn't be...
    How is it possible to correct this situation???
    Please help! I just want a way to have two users on the same machine using the same time capsule at the same time.
    Thanks!

  • Share a library between two users on the same mac?

    It is possible to share a library between two users on the same mac?

    It's doable. As it's been pointed out Aperture has no provisions for file locking so you can't have two users accessing the library at the same time. This includes having one user having the library open only for browsing. Aperture doesn't have a +Read Only+ mode, when it opens the library, even if you make no changes to any images, the library will be written to.
    This also means you can't have one user open the library and then stop using Aperture but still have the library open and then have another copy of Aperture open on the library.
    Of course if you have two copies of Aperture running even they are on different libraries you'll be in violation of the license and you'll have bigger problems to worry about then a toasted library.

  • TS2972 is it possible to use home sharing between two users on the same computer?

    My wife and I have itunes accounts and want to be able to share music we have each bought on our accounts. We have tried setting up the home sharing on our PC but it doesn't show up on the screen. Can anyone please help?

    "Is it possible to use home sharing between two users on the same computer?"
    No. Home sharing is used to connect two running instances of iTunes across a network. When you switch users on the computer all applications running on the other profile are suspended.
    You can however share your respective media folders so that they are visible in either profile and then copy over any content that you want, or you could create a single joint library which you use when either user is logged in.
    tt2

  • Two users opened the same file at the same time with file on Win2K Server

    I just had a problem with a file that could not be saved. After a little investigation I discovered that two users had the same file open at the same time. This is with both users using InDesign CS2 and saving to a Windows 2000 Server. Any ideas how this even happened? The only thing I can think of is if they both opened the file at the exact same time but even that I doubt. I guess the more likely possibility is that the user on 10.5 (which we have had a lot of problems with, it's hard to tell how many of them are CS3 problems (yes CS3) and how many are Windows 2003 Server problems) had InDesign CS2 flake out and not tell her the file was open. Has anybody else seen this? The other user was using 10.4. Both computers have the most recent updates for the OS and for their various adobe products.

    I have videos on mov file and my quick time player does not play them.
    The MOV file container is the generic QT file container. Any audio and video data compatible with the computer system used to create the file can be placed in the MOV file container. Unfortunate, other systems cannot play the file unless they too are configured with the same components as those used to create the file. The normal procedure here is to use the Finder "Info" or alternative media play "Inspector" window to determine what codecs were used to create the original file and, if they are available for your Mac, install them on your system for playback use. Also be advised that some "legacy" codecs may require playback in the QT 7 Player for proper QT support.
    I opened with other players, there is no sound. Then I opened the same file on my windows 7, it plays perfectly with the sound and everything? What is the problem?
    This would indicate these players either access your QT codec component configuration which does not include the required codec or the app has its own built-in codec support which does not include the required audio codec but you Windows 7 media player is configured with the required codec support. This may incidate the use of a really old codecs that may or may not be available/supported on a Mac any longer.

  • How to share iphoto with two users in the same imac maverick

    I can´t find the way to share iphoto/itunes with two users in the same imac with maverick software

    In conclusion, the new software is worse than the old one, really?  Because in my old mac I could share easily without copy with an external USB
    It's not iPhoto that dropped the ball but the system.  I believe it was Mavericks that broke the Shared folder compatibility for iPhoto, not iPhoto itself.
    Also having the library on an external HD is a good way of freeing up space on the boot drive to assure optional system and application performance.

  • How do i create one source file that feeds two users on the same pro book?

    how do i create one source file/folder of photos that feeds two users on the same pro book?

    Well you can do exactly the same with a folder of photos, just put in the Users/Shared folder.
    Iphoto is a mite more complex than this. It's a database and so there's a bit more involved.
    For iPhoto 09 (version 8.0.2) and later:
    What you mean by 'share'.
    If you want the other user to be able to see the pics, but not add to, change or alter your library, then enable Sharing in your iPhoto (Preferences -> Sharing), leave iPhoto running and use Fast User Switching to open the other account. In that account, enable 'Look For Shared Libraries'. Your Library will appear in the other source pane.
    Any user can drag a pic from the Shared Library to their own in the iPhoto Window.
    Remember iPhoto must be running in both accounts for this to work.
    If you want the other user to have the same access to the library as you: to be able to add, edit, organise, keyword etc.
    Quit iPhoto in both accounts. Move the Library to the Users / Shared Folder
    (You can also use an external HD set to ignore permissions, a Disk Image or even partition your Hard Disk.)
    In each account in turn: Double click on the Library to open it. (You may be asked to repair the Library Permissions.) From that point on, this will be the default library location. Both accounts will have full access to the library, in fact, both accounts will 'own' it.
    However, there is a catch with this system and it is a significant one. iPhoto is not a multi-user app., it does not have the code to negotiate two users simultaneously writing to the database, and trying will cause db corruption. So only one user at a time, and back up, back up back up.

  • How do I share one itunes account between two users on the same computer

    How do I share one itunes account between two users on the same computer without taking up twice as much space on my hard drive?

    You would need to move the itunes folder to a location that both users have permissions to access such as the Shared folder or any folder on the root level of the macintosh HD.
    You can find instructions here http://support.apple.com/kb/HT1203 This method allows you to share the content without sharing the same library.

  • Hello there - how can I share my iTunes library between two users on the same computer? I put the library in a shared folder between both and have selected this library on both as well, but when I update iTunes with music etc it only appears on one?

    Hello there - how can I share my iTunes library between two users on the same computer? I put the library in a shared folder between both and have selected this library on both as well, but when I update iTunes with music etc it only appears on one?

    Thank you Joe - I tried this but it's only showing a teensy amount of music - the stuff on the second users account as opposed to the giagntic library on the 'main' account. I actually went to a Genius Bar and they said that apple doesn't really want you to share music between accounts - parents don't want to hear their kids music etc. Which seemed strange, but it might be the case sadly   Thanks anyway!

  • Can i share music and photos between two users on the same machine?

    How can I share my music and photos between two users on the same machine?

    Thank you Joe - I tried this but it's only showing a teensy amount of music - the stuff on the second users account as opposed to the giagntic library on the 'main' account. I actually went to a Genius Bar and they said that apple doesn't really want you to share music between accounts - parents don't want to hear their kids music etc. Which seemed strange, but it might be the case sadly   Thanks anyway!

  • Sync a folder between two users on the same computer.

    I would like to sync a folder between two users on the same computer so that they are always the same when I access them from either user.

    then place this folder somewhere where both users have access to like in /Users/Shared. then there is only one folder to deal with and you don't need to sync anything.

  • How to share iTunes library between two users on the same Mac

    We have recently bought a Macbook Pro and have successfully transferred the old PC information onto the Mac.  But, the iTunes library from the PC has now just gone into the old user acct.  I am now confused as to which iTunes user name I connect my devices?  Is there a way to merge these two iTunes through the user accts?
    Thanks,
    I feel like I learning about computers all over again!

    It's doable. As it's been pointed out Aperture has no provisions for file locking so you can't have two users accessing the library at the same time. This includes having one user having the library open only for browsing. Aperture doesn't have a +Read Only+ mode, when it opens the library, even if you make no changes to any images, the library will be written to.
    This also means you can't have one user open the library and then stop using Aperture but still have the library open and then have another copy of Aperture open on the library.
    Of course if you have two copies of Aperture running even they are on different libraries you'll be in violation of the license and you'll have bigger problems to worry about then a toasted library.

  • Using the same itunes account for two users on the same macbook pro

    Hi all.  I purchased a macbook pro in september (which I have absolutely adore), but because my semester was so jam packed with work, I wasn't able to take it in for my data transfer until the Christmas season.  Everything was transferred correctly, but for some reason the transfer leaves me with two different users on the same macbook.  I don't really have any problem with this, except I want to access the music from the "old user" with the new user that I have been using since I purchased the macbook.  Is there any way that I can move my music from one user to another?  Bear in mind that I only have one itunes account, and almost all of this music was purchased legally through itunes (I had some old cd's that I transferred back when I first bought the original macbook back in 07).  Thank you!

    I'm assuming that you want to get both your purchased music AND your ripped CD's back into the New iTunes Library.  If you use iCloud to re-download all your purchased music, TV, apps and books you wont get your CD's or movies back; and you'll use up a lot of internet bandwidth and time to re-download everything.  So, I'm going to give you a way to get the music and everything else off the hard drive into your new iTunes Library.
    But, I need some clarification here.  I'm assuming that you recently used Migration Assistant to move your old Mac's user account to the new Mac, so when you turn on the new Mac you have a choice to log in as either the "Old_User" or the "New_User", or something like that.  And both user acounts are using the same iTunes music store Apple ID, right?
    And, I'm assuming that you have both accounts set up with your iCloud or MobileMe information, so they have the same info in the contacts, calandars, bookmarks, and notes.  If you didn't use iCloud to load this info to the new user, then importing your old contacts, calendars, bookmarks and such will require an extra few steps, and is a different process entirely (composed of exporting the data from each of those apps while logged in as the Old User, and then importing them while logged in as the New User). 
    I'm assuming that the main differences in the two accounts will be that your old documents, old downloads, old email, old iPhoto and old iTunes library are not merged with the new ones, right? Apples Migration Assistant would have merged the Mac Apps folder and copied over all the Shared Users documents if it was done right. I'm also assuming that you kept your old iTunes Library in your Old User account and not in the Shared Users folder, right?
    If that's the case, first decide which account will become the primary account that you you will use all the time from this point forward.  You may want to choose the account that has the most recent work that you have done with the computer over the past semester since it's set up the way you like it, or the account that has the largest amount of data and history that you don't want to move.  The next step will be done by first logging into whichever account you wont be using in the future (except to access old info that can't be moved).
    If you are happy with how it's working now and just want to move your old documents, photos, and music over to the new account, then it seems to me that it would help things if you first log in as your "Old User" name" and move (or copy) your old documents, downloads, iPhoto Library, and iTunes library to the Shared Users folder. 
    I would basically move everything important in the Old User's home folder to the Shared Users folder, keeping the files in the proper subfolders like "Music" "iTunes" "Pictures" "Movies" "Documents" "Downloads" etc...  However, if your New iTunes Library or New iPhoto Library and such are already in the Shared User's folder, make sure you don't replace them with the old ones, by renaming the old ones first (maybe add the word "old" to the name.
    Mind you, when you have moved everything, and you log out of the Old User acount, and then log in as the New User, you will usually have to enter any administrator's User name and password whenever you want to make changes to those old documents while logged in as the New User.  Before going forward you should first change the User Permissions of those files to let the New User "own" them, so it will stop asking you for a name and password every time you want to access them in the future. 
    EVERYTHING from this point forward assumes that you are now logged in as the New User, and you should not ever need to log in as the Old User, except to access your old email archives or old Keychain Access to find stored passwords (which I think are stored in the Old User's "Library" folder which is invisible and inaccessable in Lion).  I don't know how to merge old saved emails or keychain passwords into the new account (mobile me can sync the keychains or mail rules/accounts, but iCloud can't, and mobile me doesn't sync the actual emails that were downloaded since 2007).
    First, to change the "Sharing & Permissions" to the New User just select "Get Info" for any old document or enclosing folder that need their permissions changed to the New User, click on the little lock icon at the bottom right of the Get Info Window, authenticate with any Administrator's Name and Password, and click okay.  If it shows your New User name as "Read Only" change that to "Read and Write".  If your New User name is not in the list, click the "+" icon on the bottom left and select the New User name, and set it for Read and Write.  Sometimes you have to do this "+" user step more than once to get it to stick. 
    Then, after your New User name shows it's set for "Read & Write", with your New User name still selected, click on the little "cog-wheel" icon next to the +/- buttons, and choose "Apply to Enclosed Items".  The computer could take a long while to finish changing the permissions if there are a lot of files in the folder you changed, so be patient.  When it's done you should "own" all the files in that old folder as the new user.  You are now ready to proceed with importing the old music into the New iTunes library.
    First launch iTunes (still as the New User), and go to File > Preferences > Advanced.  Make sure iTunes is set to "keep itunes media folder organized" and "copy filkes to itunes media folder".  Click okay.  It may open a small window showing that things are being moved and organized, with a progress bar, and then it's done.  It wont do that if you are already organized and copied. 
    At this point, you could simply locate your old iTunes music folder in the Finder and drag the Finder folder onto the open iTunes app window and let go of the trackpad button when the cursor changes to a green "+" sign, and it will import and copy everything into the new iTunes Library.  When it's done you can delete the old Music folder in the Finder (not in iTunes).  However, you may not have enough hard drive space to make the copies, and it will be much slower than if you move the files in the finder before you import them.  You may still have duplicates of your ripped music that you added to the new iTunes Library, and can delete those from within iTunes.
    My step to get the old music to show up in the New iTunes Library by moving them instead of copying them will be done in a particular way, that will avoid having the entire old music folder left behind to take up space on your hard drive, and it will make the import process significantly faster.  You are basically going to use the Finder to move the old music folder into the New iTunes Media folder, but you need to do it in such a ways as to not overwrite the new stuff.
    So, before you move your old iTunes Music folder into the new iTunes media folder, rename the old Music folder with the word "old" in it, then move that folder into your current iTunes Media folder.  Move it, don't copy it.  If the Mac forces you to copy it, once it's done you can delete the old music's original folder, after you confirm it's all there in the copied folder.  This sometimes happens when you move files from Shared Users that you haven't changed the ownership properly before the move.  Now when you drag the old music folder onto the iTunes App window, since the files are already in the iTunes Media Folder it will not copy the files but will simply move them around and organize them inside the new iTunes Music folder.
    You can repeat these steps with the old Movies, TV shows, Apps and Books, or whatever you want to move to the new iTunes Music Library.
    I don't know how to "merge" the old iPhoto Library with the new one, but when you click on iPhoto in the dock while holding down the option key while you click, it will let you choose which iPhoto Library to open.  From a dialog box you can choose the old one, which you copied to the Shared Users folder earlier.  It's possible that a similar technique of dragging the old iPhoto library older on top of the iPhoto App window would import things, but you'd need to research that first.
    I wish I had more time to proof-read this answer, but I have to go to a meeting, but can check back later for questions.

Maybe you are looking for

  • Exchange Rate difference account-

    Hi All, Please help me to find a solution for the scenario below. Business process is third party PO scenario where the vendor currency(USD) is different from ccode currency. Material is valuated at 30 EUR. PO is made with the vendor at Rs.51.60 USD.

  • Easy dms multiple document number search

    Dear experts, We have installed easy dms 6.0 successfully. We have a problem in usage. In selection screen we need to search "document number" field with multiple search criteria, however the system permits only 1 entrance. Thanks for your help.

  • Word processing - defaults failing

    I have lately found that my word processing default settings in Preferences fail to remain as default settings. For example, I set Palatino as my default font setting and then find that, whist still showing Palatino as my default setting, it puts me

  • Error installing 10.6.4 update

    I download and install the update, but when the Mac is shutting down and installing the software I get "error installing selected update" or something similiar, then the machine reboots. M.

  • My brother and I share contacts. How can I separate them?

    At the moment, we're stuck sharing contacts.  Anytime I delete a contact, it gets deleted off his phone, which I learnt when I cleared out the contacts and he lost all of his.  If I add one, also, it's added to his phone.  How can I change this? P.S.