Display be tuen off , external hard disk also fall into sleep
I use late-2013 15-inch MBPR with Mac OS 10.9.2 .
In energy saver,I setted turn display off after 1 min, and unchecked put hard disk to sleep when possible.
I want display be turn off but the other jobs keep working.
Today when I copy data from one external HDD to another，
I found that when display be turn off, the external HDD also fall into sleep, and copy job be stop.
How can I set external not fall into sleep after display be turn off。
When you write to a hard disk it uses a lot more power in quite large surges.
Its very unlikely that the hub would have sufficient power to supply this requirement, so although the drive may appear to be spinning, you cannot write to it.
This would seem like the most likely reason.
I assume you can read files that you have placed on the drive?
The USB port on the hub is very slow, so you are better copying the files using you laptop, and using the hub for read-only.
This should work for pictures and audio, but it is unlikely to be fast enough for video.
I have a USB memory stick connected to mine, purely for swapping files between computers.
There are some useful help pages here, for BT Broadband customers only, on my personal website.
BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.
Similar Messages
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I connected my 500GB Storjet external hard drive to my mac(Mountain Lion) http://in.transcend-info.com/products/Catlist.asp?modno=325 but it is not connecting to it. Disk Utility is also not showing it. and the hard disk is working... My PS3, My Sony TV and my other laptop(win7) is detecting it... Also whenever it gets connected a blue light blinks, but It doesnt for mac. I have tried reformatting to both FAT32 and NTFS... Please help..
Also I sorta screwed my Mac so I had to do the internet recovery thing and only after that such problems occured, it was working fine before. So it installed Lion first and then Mountain Lion. It wasn't working on any of the OS.Power down the Mac, Full power off. Connect the drive using the Y cable and then turn the Mac back on.
If it still doesn't show in at least Disk Utility then start checking your USB ports to see if both are working properly. Just plug in a USB thumb drive and that should show in both Finder and Disk Utility. If one of the ports isn't seeing the thumb drive then that port is bad and the system needs to be services by Apple. -
I want to take the photos off my iPhone and put them directly onto an external hard disk - I don't have any room left on my computer. I want to bypass iPhoto altogether. When I link my iPhone to my computer, it only opens in iTunes, which only gives me the option to save my photos to iPhoto. Help! This is seriously frustrating!.
Additionally, I'd like to be able to take the 2000+ photos out of iPhoto and put them on a disk in a folder. I have managed to export them to the hard disk but it's just plonked all 2000+ photos in a list - not ideal if I want to use it for anything else. And then I have to manually delete the photos from iPhoto. Is there not a quick and easy way of dealing with this?
Anyone got any bright ideas? Thanks for your help!I too would like to be able to do this. Just put them where i want the. IFTT a scripting app will put the images in dropbox for you , but its been pretty iffy.
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Can I move an external hard disk off the finder window, to the Dock or menu bar, for instance?
I use a couple of external hard disks, one with Time Machine for every day back-ups and another for occasional back-ups of large work files and videos I have purchased. It bothers me to see them sitting up there in the top right hand corner of my screen. Can I move them permanently somewhere else, into the Dock or Menu Bar say, and still have them permanently available?
Yes.
You can drag the drive icon from the desktop into the Dock.
Then you can go to Finder > Preferences > General > Show these items on the desktop > uncheck External disks, and it should stay in the dock but not show on the desktop.
There are third party apps that will give you Finder-like access to things in your Menu Bar, like Download XMenu for Mac - Menubar item lists/launches apps, and more. MacUpdate.com , but I would avoid third party GUI-changing apps like this if I were you, as they tend to be problematic, and install background processes which slow down your mac. -
Problems with iPhoto after exporting library to external hard disk
Hello all,
I am using iPhoto 8 on an iBook G4. I recently attempted to back up my iPhoto library to an external hard disk. I did this by dragging the iPhoto library to the external hard disk. I did not delete the library on my own computer. Since I've done this, iPhoto has not been problematic. For instance, when I attempt to open an event on my computer, I can not see the thumbnails of all the photo's in the event - iPhoto will display each individual photo in sequence. If I want to print a picture, I have to export the entire event - I can't just drag the thumbnail to my desktop. Also, when I attempt to upload new pictures from my camera it produces an error.
Does anyone know what might be going on? I need to be able to access my photo's, so can anyone give me some advice on how to fix whatever I've done?
Any help you can give me would be much appreciated.Gina2008
iPhoto will display each individual photo in sequence.
There's a slider lower right of the iPhoto Window - drag it left.
Why are you exporting to Print?
when I attempt to upload new pictures from my camera it produces an error.
What does the error say?
As for accessing your pics:
There are many, many ways to access your files in iPhoto:
For 10.5 users: You can use any Open / Attach / Browse dialogue. On the left there's a Media heading, your pics can be accessed there. Apple-Click for selecting multiple pics.
Uploaded with plasq's Skitch!
To upload to a site that does not have an iPhoto Export Plug-in the recommended way is to Select the Pic in the iPhoto Window and go File -> Export and export the pic to the desktop, then upload from there. After the upload you can trash the pic on the desktop. It's only a copy and your original is safe in iPhoto.
This is also true for emailing with Web-based services. If you're using Gmail you can use THIS
If you use Apple's Mail, Entourage, AOL or Eudora you can email from within iPhoto. With 10.5 you can access the Library from the New Message Window in Mail:
Uploaded with plasq's Skitch!
If you use a Cocoa-based Browser such as Safari, you can drag the pics from the iPhoto Window to the Attach window in the browser.
Or, if you want to access the files with iPhoto not running, then create a Media Browser using Automator (takes about 10 seconds) or use THIS
Other options include:
1. *Drag and Drop*: Drag a photo from the iPhoto Window to the desktop, there iPhoto will make a full-sized copy of the pic.
2. *File -> Export*: Select the files in the iPhoto Window and go File -> Export. The dialogue will give you various options, including altering the format, naming the files and changing the size. Again, producing a copy.
3. *Show File*: Right- (or Control-) Click on a pic and in the resulting dialogue choose 'Show File'. A Finder window will pop open with the file already selected.
Regards
TD -
How do i burn idvd projects in a dvd format to an external hard disk
I have an iDVD project but it is too big to burn to a dvd (11GB!) so I was wondering if I can save the proejct like a dvd onto my External Hard Disk. This is really urgent and important for a school project.
Thanks in advance.iDVD does not care about file size (it compresses a movie file by about 4:1 o the standard mpeg2 format), only about length.
A standard DVD will hold up to 120 minutes of video, but this includes titles, transitions etc.
iDVD encoding settings:
http://docs.info.apple.com/article.html?path=iDVD/7.0/en/11417.html
Short version:
Best Performance is for videos of up to 60 minutes
Best Quality is for videos of up to 120 minutes
Professional Quality is also for up to 120 minutes but even higher quality (and takes much longer)
That was for single-layer DVDs. Double these numbers for dual-layer DVDs.
Professional Quality: The Professional Quality option uses advanced two-pass technology to encode your video (The first pass determines which parts of the movie can be given greater compresson without quality loss and which parts can’t. The second pass then encodes those different parts accordingly) , resulting in the best quality of video possible on your burned DVD. You can select this option regardless of your project’s duration (up to 2 hours of video for a single-layer disc and 4 hours for a double-layer disc). Because Professional Quality encoding is time-consuming (requiring about twice as much time to encode a project as the High Quality option, for example) choose it only if you are not concerned about the time taken.
In both cases the maximum length includes titles, transitions and effects etc. Allow about 15 minutes for these.
You can use the amount of video in your project as a rough determination of which method to choose. If your project has an hour or less of video (for a single-layer disc), choose Best Performance. If it has between 1 and 2 hours of video (for a single-layer disc), choose High Quality. If you want the best possible encoding quality for projects that are up to 2 hours (for a single-layer disc), choose Professional Quality. This option takes about twice as long as the High Quality option, so select it only if time is not an issue for you.
Use the Capacity meter in the Project Info window (choose Project > Project Info) to determine how many minutes of video your project contains.
NOTE: With the Best Performance setting, you can turn background encoding off by choosing Advanced > “Encode in Background.” The checkmark is removed to show it’s no longer selected. Turning off background encoding can help performance if your system seems sluggish.
And whilst checking these settings in iDVD Preferences, make sure that the settings for NTSC/PAL and DV/DV Widescreen are also what you want.
http://support.apple.com/kb/HT1502?viewlocale=en_US -
How to format an external hard disk Mac Os Extended (Journaled)?
hello
I connect an external hard disk (2.5' IDE Western Digital Scorpio Blue, WD2500BEVE) via USB or FireWire to my Mac mini. The Disk Utility tool shows an external disk drive of 128 GB - but the disk has 250 GB. How can I format the external USB/Firewire-harddisk 250 GB "Mac OS Extended (Journaled)"?
I tried also to format the disk on a Windows PC (Windows XP). But I could not find a software to format "Mac OS Extended (Journaled)".
Any hints on this? Thanks in advance for any feedback!andreasmarx wrote:
As I use theses hard disks in a external hard disk case, I'm asking me whether my hard disk cases do not support more that 128 GB disk capacity. Is that realistic?
It is not only realistic but probably the reason your Mac cannot see more than 128 GB of the capacity of the drives mounted in them. It has nothing to do with the interface between the Mac & case (like Firewire) but instead with the controller in the case that connects the raw ATA drive to that interface. Older ATA standards used a 28 bit LBA (logical block address) scheme to access the disk. For 512 bytes per sector this works out to a maximum of 128 GB of addressable disk capacity. The ATA-6 standard, also called Ultra-ATA/100 or just ATA-100, increased the bits in the address space from 28 to 48, with a disk capacity limit of 2 petabytes.
ATA-6 was introduced in 2001, so any external drive case made before then for ATA drives will be forever limited to 128 G. Even now, some come with a controller that does not support the ATA-6 standard, & essentially none have all the hardware to support its full 48 bits of address capacity. However, since 2 PB (2000 terabyte) drives won't be available anytime soon, all you really need is a case that is ATA-6 or better compliant & supports enough address bits for the largest drive you intend ever to put in it.
Case makers don't usually make this information easily available but many now include a "bullet" spec about the maximum capacity their case supports, typically rounded off to simple numbers like 320 GB, 500 GB, or whatever. If you can't find this info, you can assume that the newer the case the more likely it is to support larger capacity drives, or just buy one with a good return policy & test it yourself with the largest raw drive you own. -
I need to move my photo library and Movies (Events and Projects) to an external hard disk as my 700gb drive on my iMac is now full (*see note below)
I have brought 2 Samsung External drives (3TB each) which I plan to partition each for Photos and Movies i.e 2 partitions on each drive, and will use one for use with iPhoto and iMovie, and the other drive for a dedicated backup. I will backup the remainder of my iMac hardisk to a seperate disk.
What has just occured to me is that after I have moved the libraries I cannot see how existing iMovie projects and iPhoto Slideshows will work, as each Application will be looking for the source files on the original iMac hardisc (I assume).
I am running Snow Leopard v10.6.8 ( I did not want to upgrade to Mountain Lion as I was told the iPhoto and iMovie changes were a 'backward' step. However I now want to upgrade to Mountain Lion, for security updates reasons mainly, and so need to free up my hard drive.
Can anyone advise on the best way to proceed ?
* - the iMac hard disk become full very suddenly, possibly due to duplicates, as I have noticed duplicate events and clips in my iMovies event library. I have noticed that some events are also now not showing, with message 'No video clips match the current selection' (I have not search criteria set).
ThanksI was planning on manually backing up my external to the time capsule - but is there a way to set it up to back up automatically instead?
Time Machine will backup up automatically - you can not have your iPhoto library on the same volume as the TM backup (it will not work and it would not be a backup)
Dragging the iPhoto library to any external drive will backup it us also
I was also thinking about having the library copied to another external (I mean we're talking about irreplaceable photos here) - would i just drag a copy of the library to that drive as well?
Yes - that is a good idea - I run TM giving me hourly backups and a daily clone of my entire system giving me a bootable backup - plus do an occasional TM backup at our second home so I have one off site
is it possible to deal with my imovie library in the same way? so all my movies and photos are on my external?
Probably - but I use iMovie very little - better question for the iMovie forum
LN -
Mountain lion ejects external hard disks
After upgrading to Mountainlion (March 5, 2013), my LaCie external hard disk (500 GB, used for TimeMachine) was spontaneously and improperly ejected, presumably by the OS.
(1) The disk had worked without problems under OS 10.7.
(2) The disk mounts properly on an older Mac (OS 10.3.2).
(3) The disk would not mount on a newer Mac also running OS 10.8.2.
I am currently reparing the disk using Disk Utility on the old Mac, but I hesitate to attempt mounting it again on my iMac (June 2008) running OS 10.8.3. Can anyone shed light on this problem? I know I am not the only one with this difficulty, so is Apple doing something about it?It is very probably dying (I just had to replace a Lacie disk 250GB form 2008).
This disk has originally been formatted on the 10.3 and then never again?
You can format it again on 10.8, but you will loose the TM backup, so if you do that you have to make a new TM on another disk.
I would no longer trust this disk, and buy another (5 years is not bad at all). Take all you want to preserve off the Lacie on the old machine and copy it to the ML machine. -
Dear all,
What should I do? I keep getting the "startup disk full" message even when I already moved all my files and documents to an external hard disk.
Thanks a heap.For information about the Other category in the Storage display, see this support article.
Empty the Trash if you haven't already done so. If you use iPhoto, empty its internal Trash first:
iPhoto ▹ Empty Trash
Do the same in other applications, such as Aperture, that have an internal Trash feature. Then reboot. That will temporarily free up some space.
According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation. You also need enough space left over to allow for growth of your data. There is little or no performance advantage to having more available space than the minimum Apple recommends. Available storage space that you'll never use is wasted space.
If you're using Time Machine to back up a portable Mac, some of the free space will be used to make local snapshots, which are backup copies of files you've recently deleted. The space occupied by local snapshots is reported as available by the Finder, and should be considered as such. In the Storage display of System Information, local snapshots are shown as Backups. The snapshots are automatically deleted when they expire or when free space falls below a certain level. You ordinarily don't need to, and should not, delete local snapshots yourself.
See this support article for some simple ways to free up storage space.
You can more effectively use a tool such as OmniDiskSweeper (ODS) to explore your volume and find out what's taking up the space. You can also delete files with it, but don't do that unless you're sure that you know what you're deleting and that all data is safely backed up. That means you have multiple backups, not just one.
Deleting files inside an iPhoto or Aperture library will corrupt the library. Any changes to a photo library must be made from within the application that created it. The same goes for Mail files.
Proceed further only if the problem isn't solved by the above steps.
ODS can't see the whole filesystem when you run it just by double-clicking; it only sees files that you have permission to read. To see everything, you have to run it as root.
Back up all data now.
If you have more than one user account, make sure you're logged in as an administrator. The administrator account is the one that was created automatically when you first set up the computer.
Install ODS in the Applications folder as usual. Quit it if it's running.
Triple-click anywhere in the line of text below on this page to select it, then copy the selected text to the Clipboard by pressing the key combination command-C:
sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper
Launch the built-in Terminal application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
Paste into the Terminal window (command-V). You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning to be careful. If you see a message that your username "is not in the sudoers file," then you're not logged in as an administrator.
The application window will open, eventually showing all files in all folders, sorted by size with the largest at the top. It may take a few minutes for ODS to finish scanning your files.
I don't recommend that you make a habit of doing this. Don't delete anything while running ODS as root. If something needs to be deleted, make sure you know what it is and how it got there, and then delete it by other, safer, means. When in doubt, leave it alone or ask for guidance.
When you're done with ODS, quit it and also quit Terminal. -
Menu bar items disappear, and external hard disks not mounting
Hi,
This problem started yesterday. I start up my Mac, and none of the menu bar items in the top-right of the screen show up. Then I noticed that none of my external hard disks had mounted.
Looking at the Activity Monitor, I saw that sustemuiserver was not running.
Reading around, I discovered that this usually follows a FrontRow hack (which I haven't installed). I tried deleting the ~/Library/preferences/com.apple.systemuiserver.plist file and logging out and back in again. Everything seems to work again, for a while. However, the same thing happened this morning.
Has anyone else experienced this, and anyone know a fix to stop it from happening?
Thanks!
TomI've been having the same problem for a while (I believe since 10.5.3). I have reinstalled OSX, installed OSX 10.5.6 combo hoping that it would fix it, but nothing yet. I have the problem only when I insert an expresscard into the slot and restart. It connects to a PCI expansion chassis. When I restart with the ExpressCard installed, all menu items dissappear and I can't eject volumes (hard drives) from the desktop. If I restart without the ExpressCard in, the menu bars seem to work properly. I tried with an older G4 running 10.4.11, with a CardBus card and the same chassis, and that worked fine... all menu bar items displayed and worked properly and I could eject disks.
I have also tried creating new users, but that didn't work either. -
I3 window manger & automount external hard disk / usb drive
Hi,
I using arch x86_64 with 3.11.5-1-ARCH #1 SMP PREEMPT kernel + i3 window manager + pcmanfm.
But i'm unable to automount my external hard disk or usb drive.(I have installed gvfs package as well.
Also is there any gui tool to configure keybinding? (something like obkey in openbox)
Please help.
Thank you.epic wrote:Also is there any gui tool to configure keybinding? (something like obkey in openbox)
I think you need to look at https://wiki.archlinux.org/index.php/I3#Volume_Manager and the output of man i3
tl;dr - the ~/.i3/config file does it nicely.
Here is mine:
ewaller$@$odin ~ 1001 %cat .i3/config
# This file has been auto-generated by i3-config-wizard(1).
# It will not be overwritten, so edit it as you like.
# Should you change your keyboard layout somewhen, delete
# this file and re-run i3-config-wizard(1).
# i3 config file (v4)
# Please see http://i3wm.org/docs/userguide.html for a complete reference!
set $mod Mod4
# Font for window titles. Will also be used by the bar unless a different font
# is used in the bar {} block below. ISO 10646 = Unicode
#font -*-charter-medium-r-*-*-*-100-*-*-*-*-*-*
# The font above is very space-efficient, that is, it looks good, sharp and
# clear in small sizes. However, if you need a lot of unicode glyphs or
# right-to-left text rendering, you should instead use pango for rendering and
# chose a FreeType font, such as:
font pango:DejaVu Sans 8
# Use Mouse+$mod to drag floating windows to their wanted position
floating_modifier $mod
# start a terminal
bindsym $mod+Return exec i3-sensible-terminal
# kill focused window
bindsym $mod+Shift+q kill
# start dmenu (a program launcher)
bindsym $mod+d exec dmenu_run
# There also is the (new) i3-dmenu-desktop which only displays applications
# shipping a .desktop file. It is a wrapper around dmenu, so you need that
# installed.
# bindsym $mod+d exec --no-startup-id i3-dmenu-desktop
# change focus
bindsym $mod+j focus left
bindsym $mod+k focus down
bindsym $mod+l focus up
bindsym $mod+semicolon focus right
# alternatively, you can use the cursor keys:
bindsym $mod+Left focus left
bindsym $mod+Down focus down
bindsym $mod+Up focus up
bindsym $mod+Right focus right
# move focused window
bindsym $mod+Shift+j move left
bindsym $mod+Shift+k move down
bindsym $mod+Shift+l move up
bindsym $mod+Shift+semicolon move right
# alternatively, you can use the cursor keys:
bindsym $mod+Shift+Left move left
bindsym $mod+Shift+Down move down
bindsym $mod+Shift+Up move up
bindsym $mod+Shift+Right move right
# split in horizontal orientation
bindsym $mod+h split h
# split in vertical orientation
bindsym $mod+v split v
# enter fullscreen mode for the focused container
bindsym $mod+f fullscreen
# change container layout (stacked, tabbed, toggle split)
bindsym $mod+s layout stacking
bindsym $mod+w layout tabbed
bindsym $mod+e layout toggle split
# toggle tiling / floating
bindsym $mod+space floating toggle
# change focus between tiling / floating windows
bindsym $mod+Shift+space focus mode_toggle
# focus the parent container
bindsym $mod+a focus parent
# focus the child container
#bindsym $mod+d focus child
# switch to workspace
bindsym $mod+1 workspace 1
bindsym $mod+2 workspace 2
bindsym $mod+3 workspace 3
bindsym $mod+4 workspace 4
bindsym $mod+5 workspace 5
bindsym $mod+6 workspace 6
bindsym $mod+7 workspace 7
bindsym $mod+8 workspace 8
bindsym $mod+9 workspace 9
bindsym $mod+0 workspace 10
# move focused container to workspace
bindsym $mod+Shift+1 move container to workspace 1
bindsym $mod+Shift+2 move container to workspace 2
bindsym $mod+Shift+3 move container to workspace 3
bindsym $mod+Shift+4 move container to workspace 4
bindsym $mod+Shift+5 move container to workspace 5
bindsym $mod+Shift+6 move container to workspace 6
bindsym $mod+Shift+7 move container to workspace 7
bindsym $mod+Shift+8 move container to workspace 8
bindsym $mod+Shift+9 move container to workspace 9
bindsym $mod+Shift+0 move container to workspace 10
# reload the configuration file
bindsym $mod+Shift+c reload
# restart i3 inplace (preserves your layout/session, can be used to upgrade i3)
bindsym $mod+Shift+r restart
# exit i3 (logs you out of your X session)
bindsym $mod+Shift+e exit
#bindsym $mod+Shift+e exec "i3-nagbar -t warning -m 'You pressed the exit shortcut. Do you really want to exit i3? This will end your X session.' -b 'Yes, exit i3' 'i3-msg exit'"
# resize window (you can also use the mouse for that)
mode "resize" {
# These bindings trigger as soon as you enter the resize mode
# Pressing left will shrink the windows width.
# Pressing right will grow the windows width.
# Pressing up will shrink the windows height.
# Pressing down will grow the windows height.
bindsym j resize shrink width 10 px or 10 ppt
bindsym k resize grow height 10 px or 10 ppt
bindsym l resize shrink height 10 px or 10 ppt
bindsym semicolon resize grow width 10 px or 10 ppt
# same bindings, but for the arrow keys
bindsym Left resize shrink width 10 px or 10 ppt
bindsym Down resize grow height 10 px or 10 ppt
bindsym Up resize shrink height 10 px or 10 ppt
bindsym Right resize grow width 10 px or 10 ppt
# back to normal: Enter or Escape
bindsym Return mode "default"
bindsym Escape mode "default"
bindsym $mod+r mode "resize"
# Bindings for my HP Pavilion
bindsym XF86AudioPlay exec mpc toggle
bindsym XF86AudioPrev exec mpc prev
bindsym XF86AudioNext exec mpc next
bindsym XF86AudioStop exec mpc stop
bindsym XF86AudioRaiseVolume exec pavolume increase
bindsym XF86AudioLowerVolume exec pavolume decrease
bindsym XF86AudioMute exec pavolume mute
bindsym XF86Save exec dmenu_run
bindsym $mod+x exec x48
bindsym $mod+Tab workspace next
bindsym $mod+Shift+Tab workspace prev
bindsym Mod1+Tab workspace next
bindsym $mod+Menu exec i3-winmenu.py
bindsym $mod+XF86Save exec gmrun
for_window [title="Execute program feat. completion"] floating enable' border none; focus mode_toggle
for_window [title="x48-0.6.4"] floating enable' border none; focus mode_toggle
for_window [title="Wicd Network Manager"] floating enable' border none; focus mode_toggle
# Float notifications
for_window [class="Xfce4-notifyd"] floating enable; border none; focus mode_toggle
# Start i3bar to display a workspace bar (plus the system information i3status
# finds out, if available)
bar {
status_command i3status
#exec --no-startup-id i3-msg 'workspace 2; exec firefox; workspace 1'
exec --no-startup-id i3-msg 'workspace 10; exec claws-mail; workspace 1'
exec --no-startup-id exec nitrogen --restore
exec --no-startup-id exec xcompmgr
exec --no-startup-id exec conky
exec --no-startup-id exec mpd
#exec --no-startup-id emacs
exec --no-startup-id exec wicd-gtk -t
ewaller$@$odin ~ 1002 % -
hi
i used windows 7 at home, and imac at school. LOTS of files (and folders) are missing from my external hard disk when i connect it to my mac. what happened? are they hidden? are they corrupted?
what can i do other than reformatting my external HD? i cant do it (i.e. reformat) everytime it happened!
please help..
p/s: i hope this question is on the right topic.This partly depends on the Mac OS version in the School iMacs, and on the kind of files you need to access, two things we do not yet know from your initial post.
I would not reformat the drive yet. Unless the Mac OS at school is extremely old, it should be able to read a disk formatted for Windows.
Macs and PCs can share a number of data files: most of the MS Office apps (Word, Excel, PowerPoint) produce true, cross-platform documents. All pdf files should be cross-platform.
On the other hand, a Windoze-only application like Microsoft Publisher creates a file that Macs do not recognize. The Mac should be able to "see" the file on the drive but cannot associate it with a Mac app for opening.
The myriad of system files from either OS may or may not be hidden. You would seldom need access to those files on either system.
If you post what OS is on the iMacs at your school and what types of file are on the hard drive that you need to access at school, then I think people here can better help.
newblexx wrote:
p/s: i hope this question is on the right topic.
It is if the iMacs at school are the ones with an articulated display arm and the half-dome base. In the long run, you may be better off posting in the forum section for whatever OS is on the school's iMacs, but continue here for now. -
Disk write cache corruption on an external hard disk
Recently I purchased an external hard disk, to put all of my pictures of my baby due to space limitations on my internal laptop drive. Since my Canon camera 10 megapixel pictures take up a ton of space this was occurring at an alarming rate. My intention was also to back up to DVD but never got to it. This is both a comment and a question.
Now said baby, is getting really good at pulling cords etc. He managed to do this on the external drive firewire cable. As far as i know the drive was not in the process of actually writing. However, after a few minutes and trying to re-plug the drive the OS crashed with a Grey Screen of Death hardware error that tells you that you need to push the power button..
This apparently corrupted the drive's directory. Upon reboot the drive would not mount. Since there were time machine backups on the drive too Diskwarrior was not able to reconstruct the drive in the built in memory available on the computer. Time machine stores millions of files and Diskwarrior apparently wants to keep it all in memory at once. Since my computer has 2GB you would hope that would be enough but apparently not. So that failed. Other utilities seemed to be able to find the files but not restore the directory. I also took it to the apple store they were not able to recover it.
I have to say this is extremely distressing, and hard to believe that a simple accident like this could cost the loss of thousands of pictures. I did send it to a rescue company but that was expensive but I think apple needs to do something about this situation.
On Windows there is a way to disable the write cache for external drives. This is not available for Mac OS X. This would prevent this rather common occurrence of a plug accidentally becoming disengaged when the drive is not in the process of writing. This reduces the odds but I still think apple, in order to become clearly superior, needs a better solution.
I know Apple has experimented with ZFS would this not eliminate this possibility of this kind of disaster? Is this in Snow Leopard desktop? I know they are thinking this is a business customer focused technology but clearly if it can eliminate this kind of thing then I think it is extremely useful to their non server customers. Perhaps there are other ways of dealing with this issue but ZFS is designed to deal with these issues. HFS+ is extremely fragile to disk corruption.
I know my situation is not that uncommon and this is not the first time this has happened to me with an external drive. You would think I had learned. I hate to think of how many other people have had the same thing happen to them.Disabling a write cache would not help you with the problem you are having. Besides the write cache is on the hard drive and operates independently of the operating system. But nothing can protect you from disconnected an external drive improperly, and if the drive is in the process of being written to, and the problem comes from directory corruption, not file corruption, as in the case you have described, disabling a write cache would not have made any difference.
For the future the magic word is: Backups.
< Edited by Host > -
Here's the deal. Currently running SL 10.6.8 on a MAC Mini. Planning for eventual upgrade to ML. Have a 1TB external hard drive partitioned into two volumes, one volume for Time Machine and one volume for SL which I periodically update using Superduper. Thus I always have a point-in-time bootable backup on the external hard drive.
The MAC Mini supports Firewire 800. However, booting from my current external hard disk is pretty slow, since it only supports Firewire 400. I am considering buying an Iomega MiniMax which supports Firewire 800. Then, I would use the MiniMax as my bootable backup volume, and relegate the older hard drive to Time Machine.
So, question #1 is, can I daisychain the new MiniMax between the MAC Mini and my existing external hard drive? My expectation is that the new Mini Max would run using Firewire 800 and that the existing hard drive would run at Firewire 400 speed as it does today. If it doesn't (e.g., daisychaining in the Firewire 400 external disk with the MiniMax Firewire 800 external disk ends up running the whole leg at 400), my resolution will be to run the existing hard disk off an available USB port and have just the MiniMax running at Firewire 800.
Why am I going to all this trouble? That's question #2. I don't trust upgrades; they always break something. When I upgraded from 10.5.x to 10.6.x, the web directories got renamed, and all of my web apps 403'd until I figured out what happened. Plus, I have accounts for other family members, and in order to ensure their ability to use the computer during my upgrade process, I need to have the ability to fall-back quickly to a known-stable version of OSX. So what I'm trying to do is insulate myself from problems by partitioning the MiniMax into two volumes, taking a Superduper image of my current installation on the Mac Mini to MiniMax external drive volume 1, then upgrading to ML on the MAC Mini, and take a SuperDuper image of that to MiniMax external drive volume 2. Then, if the upgrade results in problems I can't resolve immediately, I can simply reimage the MAC Mini from MiniMax volume 1. BUT ...
... I've read that the ML installation creates a "service and support" partition that is different than the startup disk. I'm concerned that I won't be able to reimage the hard disk in the MAC Mini once I upgrade it to ML because of the partitioning changes it introduces on the startup disk. Theoretically, I +should+ be able to use the disk utility on my SL system to repartition the disk in the MAC Mini prior to reimaging it from my backup, but I'm considering the possibility that the new partition may be of a type that the SL disk utility cannot identify, and might therefore be unable to delete or even detect. So I'm hoping someone else has been down this road and can advise me. Even at Firewire 800 speeds, booting from an external disk is still going to be slow, so I want to be able to restore my SL image to the MAC Mini hard disk.
A little background on me. I work for a major disaster recovery provider. I used to have a Mac PRO G5, which I got used, and the first thing I did with it was install a second hard disk, SuperDupe an image from the first disk to the second, and made sure I could boot from the second. THEN I started using and customizing the MAC. I really feel vulnerable with the MAC Mini, since it only has the single internal hard drive - sort of like going out in public dressed only in a long T-shirt. So my whole thing is, I ABSOLUTELY MUST BE ABLE TO PUT THINGS BACK THE WAY THEY WERE before I do the migration to ML.
Obsessive-cumpulsive? Yep. Anal? You got it. That's why I'm in the DR business.You may have overloaded the port, following the instructions below it should reset:
+1. Shut down the computer.+
+2. Disconnect all devices and all other cables, except the keyboard and mouse cable(s).+
+3. Disconnect the computer from the power outlet and wait for 3 to 5 minutes.+
+4. Plug the computer back in and turn it on.+
+5. Reconnect the device(s) (one at a time if there is more than one) and test. Test with each port if you have more than one.+
http://support.apple.com/kb/HT1317?viewlocale=en_US
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