Safety Margin - Remaining Free Space - Storage Drives

Hello my friends - haven't been here for a while - hope all is well.
As a good rule of thumb regarding 'Operating System Drives', and probably 'Storage Drives' as well, it's my understanding one should leave approx. 10% of the total capacity of the drive FREE. My concern mainly focuses on external storage drives for Video, and other Media.You guys have any comments or latest news about this?
Thank You
Mike
Trailer;
http://vimeo.com/7340608

I'd review it in terms of file modification. If I were using these for "data" but was frequently modifying the files then I'd leave more room, kind of like your OS is constantly modifying files and that's why you need to give it lots of space. In my case I almost never modify files once they are on the archive drives and I perhaps take it to an extreme - 320MB free on a 160GB drive which is 0.2%. I do have a second "data" drive in my computer that is used only for media, but since I often modify those files I leave at least 4 GB free. Still, most of those files are 2-5MB MP3s so I am less worried about fragmentation of the files themselves (vs. free-space fragmentation) than if they were 1GB videos. While I'm at it, I do have the OS on its own 70GB partition with 55GB free. I keep all my data files (and even some applications) on a separate partition so the OS can really do what it wants with the OS partition.
I do verify the drives when I do plug them in once or twice a year. Some may say, "Too little space! Too little space !" but honestly in 10 years of doing this I have never had an issue with the drives apart from one bad sector (which probably would have happened anyway). All these archive drives have duplicates (except, of course, where I have an original commercially pressed CD) so if something does happen...
Oh! Oh! One of my pet peeves - "percentage free". I'd be happy if somebody can explain a rationale for this in this era of greatly varying drive sizes. If an OS requires 18 GB for operating space then 18 GB on an 80 GB drive is going to be a very different percentage than 18 GB (or even 20GB if you allow extra for drive overhead) on a 1000 GB drive. I figure Tiger seems to level off at 6GB VM on my computer so I'll give it 18GB to do its thing (and as I said above I really gave it its own big partition). When I moved it to a bigger drive it didn't seem to change its requirements; ergo its % free demand dropped.
Welcome back, BTW.

Similar Messages

How can I add new content in iDVD to a DVD-RW disc which has ample remaining free space? After preparing the new video for burning and clicking on Burn to iDVD, I get a window saying the disc's already recorded and that I can either Erase or Eject.

How can I add new content in iDVD to a DVD-RW disc with a video previously successfully recorded on it? (The disc has ample remaining free space.)
After preparing the new video for burning and clicking in the File menu on Burn to iDVD, I get a window saying the disc's already recorded and that I can either Erase or Eject. My assumption has been that iDVD would automatically find the free space and continue with the new recording from there. I'd be grateful if anyone can shine light on this.

There are, but not with a DVD written as a movie disk. It must be closed when completed, or it doesn't work.
Apple's built in Burn utility also automatically closes any data CD, DVD or Blu-ray disk you burn. Doesn't matter how much space is unused, you can't use it. You'd have to use a more advanced disk creation app, such as Toast Titanium. I then have the option of choosing to write the data as a session:
I can keep doing this until the disk is full. If I've written five sessions to the disk, when I put it in the drive, five CD/DVD icons will appear on the desktop since the OS will treat each session as if they are separate physical disks. At any point you choose Write Disk when writing a group of data, that means you're closing the disk, and again can't add anything after that. So if I had written two sessions, and the third was Write Disk, it's over. I can't put anything else on that disk.

Increasing free space on drive C

My computer was really low on free space on drive C. It seemed as if Adobe programs were eating up space on drive C. I managed to increase the free disk space from 2.7 GB to 8 GB.
(Try at your own risk...)
Windows XP
1. Delete picture folders from C:\Documents and Settings\Main Administrator\Application Data\Adobe\Bridge CS4\Cache
Bridge apperantly saves some files automatically. I had some old photos there that I'd already backed up.
2. Delete C:\Documents and Settings\(user name)\Application Data\Adobe\CameraRaw\Cache
3. In premiere pro cs4: Edit>Preferences>Media change the location of Media Cache Files and Media Cache Database from drive c to any other drive.

You are playing with fire!
The proper way to control and purge these caches can be found as follows in Bridge:
Edit=>Preferences=>Cache
provides facilties to set the location of the Bridge cache, control its maximum size, to compact the cache, and to purge the Bridge cache.
Edit=>Camera Raw=>Camera Raw Cache
provides facilities to set the location of the Camera Raw cache, control its maximum size, and to purge the Camera Raw cache.
Don't go willy-nilly deleting files!
- Dov

NOT using xp_cmdshell, Can we check free space of drives in windows servers?

Hello all,
I have a strange situation here(may not be to you), as per client security standards,
I should NOT use xp_cmdshell. Adding to this, I was asked to generate a report daily about drives and their free spaces.
Having with xp_cmshell, we have numerous ways to execute this task easily but
NO xp_cmshell. Also, I can't use xp_fixeddrives system proc because it doesn't show-up mounted drives.
So, it would be great if you can share any other possible options using SQLCMD, PowerShell, T-SQL scripts etc that we can get the drives list (including mount points, root directory(C$), Quorum drive, MSDTC drives) and their free spaces.
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Appreciate your help and time in regarding.
Thank you all!!

Is powershell an option for you?
If yes, its quite easy to come with PS script for this
see examples here
http://www.codeproject.com/Articles/757946/Retrieve-Disk-Space-of-Remote-Computers-using-Powe
http://blogs.technet.com/b/heyscriptingguy/archive/2012/08/08/use-powershell-to-create-a-report-displaying-free-disk-space.aspx
As far as I know sys.dm_os_volume_stats only gives the details ofabase files exist
Please Mark This As Answer if it solved your issue
Please Mark This As Helpful if it helps to solve your issue
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You need at least 14.8GB os free space (My drive is 36GB)

Hello.
I just got a new 10k rpm Sata drive for my powermac G5.
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Thank you.

Hello filipe:
Welcome to Apple discussions.
I suggest you contact the manufacturer of the drive (E-mail or snail mail) and ask the question.
Barry

How to find remaining free space in your schema

Hi
I am new to Oracle hence this question..
What is the command that would help me know how much percent of space allocated to my schema has been used and also how to find remaining amount of space in bits or bytes or whatever from SQL or any where... I am not a database admin (fyi)
Appreciate ur help in this reg
Thanx
Kris

Kris, free space is not assigned to a schema in Oracle per say, but it you mean "how can I see how much of their quota a user has used?" then the following should help.
You can find quotas in dba_ts_quotas (also user version)
You can find how much space has been used in dba_extents (also user_extents)
You should be able to write a query that compared the sum of the used space for a tablespace to the quota for the tablespace. Try the following query (notice how DBA's are treated)
select q.username, q.tablespace_name,
q.bytes as Quota, e.spcused as Used,
round(q.bytes/e.spcused * 100,2) as Percentage
from dba_ts_quotas q,
(select tablespace_name, owner, sum(bytes) as spcused
from dba_extents
group by tablespace_name, owner
) e
where q.tablespace_name = e.tablespace_name
and q.username = e.owner
If you are actually interested in how much free space is left in a tablespace you can look at dba_free_space (user_free_space), but the value returned is not adjusted for the quota limitation. You need the query above for that.
HTH -- Mark D Powell --

My volume mac os x looks 0 KB available space what should I do to free space on drive

disck drive mac os x looks full but its about 75GB free what should i do to free space on Disk drive

First action: Empty the trash.
Than do a search on this forum... you will for sure find a lot of suggestions since the matter was for sure discussed before.

After using "erase free space," hard drive has almost no available capacity

I decided to clean all the files off my iMac as I wasn't using it as my primary computer anymore. After deleting the files, I used Disk Utility and used "erase free space" with the 7x option. I also emptied the Trash folder.
When I checked the HD, I found:
Capacity: 297.77 GB
Available: 4.68 GB
Used: 293.09 GB
This makes no sense to me, since there is very little on the computer (some applications). Also, before I started, I know there was about 260 GB available.
I'd appreciate some advice on how to "free up" the available space that I know must be there.
Thanks!

Hi, sounds like the secure erase didn't finish maybe & left a big invisible file on there.
How much free space is on the HD, where has all the space gone?
OmniDiskSweeper is likely the easiest/best, and is now free...
http://www.omnigroup.com/applications/omnidisksweeper/download/

Remaining free space in my schema

Hi
I am new to Oracle hence this question..
What is the command that would help me know how much percent of space allocated to my schema has been used and also how to find remaining amount of space in bits or bytes or whatever from SQL or any where... I am not a database admin (fyi)
Appreciate ur help in this reg
Thanx
Kris

Hi
You can run
SELECT * FROM USER_TS_QUOTAS;
TABLESPACE_NAME BYTES MAX_BYTES BLOCKS MAX_BLOCKS
USERS 204800 -1 25 -1
In this case is -1 = nolimit, I can fillup the tablespace

Deleted 75GB of files though it did not free space on drive?

I deleted over 75GB of files from my Macbook Pro (my iPhoto database) and when I Get Info on the hard drive it does not show that it freed up space, this is after I emptied the trash. Any ideas why?
Thanks.

iPhoto has it's own trash. You need to empty that. Right-click on the Trash "album" and select Empty Trash.
Or, select the Trash, and then click the Empty Trash button in the top-right of the window.

I'm down to 11GB free space remaining.

I run Time Machine and have a 1T external.
How do I regain memory on my iMac?
What is safe to delete?

Extra space /Storage drives
The second drive you connect is going to be your "extra storage drive" basically to free up space off the internal boot drive by transferring files to it.
Formatting:
You first need to format this drive, you use Disk Utility in the Applications> Utilities folder.
On the FAR LEFT side will be the 'name of the drive make + numbers/letters ' + "media" click that and then click the Partition tab
(If the partition tab does not appear, you likely didn't click on the right item on the far left side.)
Now click 1 Partition, Option: GUID, format OS X Extended (Journaled), give it a name like "StorageOne" and click Apply.
Now click the Erase Tab and Security Option> Zero All Data and click Erase (use the same name) this will take a long time, like 2 hours per 1TB. It's going to check the drive for any errors and make sure it's working.
Note: If the drive fails to format, then perform the Zero All Data first, then visit the Partition tab.
Once the second drive is finished, then do the third drive in the same manner, this time naming it "StorageTwo"
Transferring Data off to the Extra Storage drive
Connect only StorageOne drive and visit your User/Movies folder, it's likely the biggest culprit of oversized files. Create a new folder on the StorageOne drive called "ExtraMovies" and transfer the contents of User/Movies to the "ExtraMovies" folder via drag and drop methods.
Confirm the files were transferred and then delete those movies by dragging them to your Trash can and selecting "Empty Trash" from the Finder menu (if you select Secure Empty Trash on large files it takes a really long time to finish as it's scrubbing the drive, likely unnecessary except for sensitive files)
If you have a large amount of User/Files elsewhere, you will have to search yourself and repeat the same steps to free up room on your internal boot drive.
Once you have made some free space, download this free program to help you visualize where all your space is being taken up.
http://grandperspectiv.sourceforge.net/#download
Once you have completed moving files to the StorageOne drive, connect StorageTwo and copy the contents of StorageOne folders to StorageTwo drive. Both drives have to be connected of course.
Rule of thumb
Maintain TWO separate hardware copies of your User data at ALL TIMES
Because you need more room, thus the storage drives are for extra space. The TimeMachine drive is a backup of your internal boot drive and the second storage drive is a backup copy of the first storage drive. So that way your sticking with the rule of thumb, get it?
Don't connect TimeMachine while your transferring files, or formatting drives, you don't want it to "kick in" while your doing all this heavy work or transferring a large amount of files, I think it does so every hour, which you are going to taking quite some time to do all this work.
Once your all done making room and copying files to the Storage drives, disconnect them and label them and date them.

How to free up disk space on drive C

We have been running Windows Small Business Server 2011 Essentials Sp1 for a number of years now without any apparent problems. We have noticed over this period, the free space on the 'C' drive diminishing over time. We are now at a point where housekeeping
needs to be undertaken to prevent disk space issues occurring in the future.
1) Is there an in-built utility that would identify what applications or directories are using the most space? If not, are you aware of a utility that could offer this functionality i.e. Treesize. Does Microsoft offer a utility?, maybe as part of Systernals?
2) The 'C' drive is 60Gb in size (I believe this was the default size during the install). When the server was initially installed, it had 20Gb free space on drive 'C'. At the point of writing, free space is now 7Gb. All installed applications and user shares
are pointing to a second drive (D). I'm assuming that the increase in used space is caused by log files or windows updates.
2) I've manually scoured the 'C' drive and noticed that folder 'C:\Windows\winsxs' is 10.6Gb in size. I believe this folder relates to Windows Updates. Are we able to carry out housekeeping on this folder? If so, please could you advise the correct way of achieving
this. The 'Disk Cleanup' utility only offers to clean up 1.2Gb which is not enough.
I hope someone can offer some assistance.
Regards

Hi LMG09,
Currently, please refer to following article and check if help us to recover Disk Space on C drive on the SBS
2011.
Recovering
Disk Space on the C: Drive in Small Business Server 2008
à
I've manually scoured the 'C' drive and noticed that folder 'C:\Windows\winsxs' is 10.6Gb in size
The Windows component store (C:\Windows\winsxs) directory is used during servicing operations within Windows
installations. Servicing operations include, but are not limited to, Windows Update, service pack, and hotfix installations. The component store contains all the files that are required for a Windows installation. And, any updates to those files are also held
within the component store as the updates are installed. Please also refer to following article and check if can help you.
How
to Clean up the WinSxS Directory and Free Up Disk Space on Windows Server 2008 R2 with New Update
If any update, please feel free to let us know.
Hope this helps.
Best regards,
Justin Gu
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How do I erase the free space on macbook pro retina?

I went to erase the free space on my MacBook Pro Retina in the Disk Utility but it says not available for this type of drive. Is there a way I can get around this?

You can't use Disk Utility to securely erase a Solid State Disk drive, because of the fact that SSD's have limited write capability, unlike hard drives, thus have to protect the sectors from as little writes as possible.
In fact TRIM (wear leveling) is enabled to write new data to the least used sectors on a SSD each time.
The NSA guidelines for secure data destruction on SSD's is to grind them into a fine powder.
If you don't require this level of data destruction, you can do this trick below, but not often or you'll premaurely wear out your SSD.
Finder > Duplicate a small file repeatly in a folder until slightly more than 50% of the remaining free space on the SSD is used up, (use Activity Monitor) then delete this folder.
Then duplicate a different small file repeatly in another folder in the same manner.
What this will do is, because of the small file, OS X will fill the smallest unused spots on the SSD, the duplicates will fill the remaining free space half way, then the second folder will (because of TRIM) fill the other remaining 50% of the free space.
You can't fill your boot drive or the machine can refuse to function or boot, but because of the wear leveling this should overwrite all your available free space on the SSD once.
If you have a laptop and TimeMachine, there is a hidden database on the boot drive which will store a copy of the deleted data.
Then there is "versions" and it's possible a copy of the deleted data is stored in that cache file still on the SSD.
I can advise how to delete the TimeMachine backup file on the boot drive, but not the "versions" database or what it contains.
How do I securely delete data from the machine?
If your really paranoid it's likely best to reformat the entire MacintoshHD partition from recovery and then with a new user, then do the Finder > Duplicate procedure to overwrite the deleted data off the SSD, this way the "versions" and TimeMachine databases are also overwritten.
Nothing is safe anymore.

Does Secure Empty Trash Accomplish the same task as Running disk util to wipe free space

Does using the secure empty trash option accomplish the same task as running disk util to eliminate free space from old deleted files? I'm currently running the 7 pass deal on my late '12 iMac. Says its gonna take 7 hrs. Can I use safari or iTunes while the Big Mac works its magic?

Does using the secure empty trash option accomplish the same task as
running disk util to eliminate free space from old deleted files?
No.
Finder > Empty Trash just tells the file system that those areas on the drive are now available for overwriting with new data. Data deleted off hard drives can be recovered if this method is used before it's overwritten with new data with special software.
Finder > Secure Empty Trash runs a 7x pass military approved overwrite only on the deleted files in the Trash, works for hard drives only.
Disk Utility > Erase Free Space creates a huge file that takes the remaining free space on the volume selected and either writes zeros or 7x pass, then confirms it and then removes the file. Takes a long time to complete, do not interrupt.
This can be used if one forgets to use Secure Empty Trash or wants to scrub caches or other files that don't necessarily go to the Trash for user deletion, such as program files that self delete and download cache files etc.
Only works for hard drives and there is no recovery possible for nearly all users. Those with special expensive magnetic equipment can possibly recover data off a zero pass, but not off a 7x overwrite.
The zero erase free space can be also be used to pre-eliminate potential unknown bad sectors on hard drives before wanted data is written to them, thus preventing future issues with data retention on hard drives.
Disk Utility > Erase - (not moving the slider) will erase all data on the volume or partition selected, including wanted data. It just tells the file system the deleted data is ready for overwriting. Thus can be recovered using special software before it's overwritten on hard drives only.
Disk Utility > Erase w/Security Option - (or moving the slider from the left) will secure erase all data on the volume or partition selected, including wanted data.
It can vary on the operating system version used from zero pass, to 3x overwrite, to 7x overwrite to 35x overwrite (old version for days past of smaller drives, don't use on newer larger drives as it will take weeks to finish.)
Secure erase methods are used to secure erase private data off of hard drives only, doesn't work for SSDs.
For secure data deletion off a SSD or any flash media, it's NSA advised to grind it into a fine powder.
How do I securely delete data from the machine?

Insufficient free space error

Hello.
I try to install EHP4 on ERP 6.0
I have x86_64 windows server with two partitions: drive c: and large drive mounted to c:\oracle\SID
Installation interrupts at PREP_GENCHECKS/SPACECHK_OPT with message
ERROR> Insufficient free space in the database as follows:
Create TABLESPACE PSAPSR3701 with 64637 MB
- it cannot find enough free space on drive c:
But tablespace should be created under c:\oracle\SID, and there is a lot of free space.
Can I skip this delirious check of c:\ ?

Hi,
Please ensure your brtools is at the latest
version as per note 12741.
If the problem still persists, you can set the trace level for brspace
to 11 as per note 29321 and re-run the phase.
Usually in sap upgrade this is related to Oracle dba_free_space not the
system free space, same theory should apply to EHP install. If you have
an Oracle dba you may ask him to check the data dictionary view
dba_free_space and available extents for each tablespace.
Also please review carefully points within Note 716377 - Problem
analysis in the upgrade: SPACECHK phases ?
Regards,
Aidan

Safety Margin - Remaining Free Space - Storage Drives

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