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I created a new filesystem (F: - destination) and synced with another (E:\ - source). Curiously my new FS had 7GB of difference from source FS.
I found out that the file below has 8GB (size) and 1GB (used) in source and 8GB (size) and 8GB (used) in destination.
I don't know if I can delete this file safely. I think no!
E:\System Volume Information\DFSR\SimilarityTable_1
Questions:
(1) What's this file?
(2) How can I fix it?
It is an internal database file used to keep track of signatures for content that the distributed file system has seen. This way, given a new signature, it can generate new files based on chunks of data it already has.
Cross File RDC:
by using a special hidden
sparse file (located in drive:\system volume
information\dfsr\similaritytable_1) to track all these signatures, we
can use other similar files that we already have to build our copy of
a new file locally. Up to five of these similar files can be used. So
if an upstream server says "I have file X and here are its RDC
signatures", we the downstream server can say "ah, I don't have that
file X. But I do have files Y and Z that have some of the same
signatures, so I'll grab data from them locally and save you having to
transmit it to me over the wire."
Depending on what you are trying to do, it is safe to delete that directory and clean up the old database files. See this manual for the steps involved (and when to do so).
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Closed 2 years ago.
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What is the best way to copy files from one computer to another using ZFS or checksumming?
I have a FreeNAS server with ZFS and a Mac with Mojave and ZFS.
I want to copy a large (4 TB) Time Machine sparsebundle from the server to the ZVOL on the Mac over the network.
I wonder if there is a ZFS-enhanced way to do this, which perhaps includes metadata or checksums.
Apparently ZFS only includes options for copying (send/receive) complete filesystems or volumes, not individual files.
I found the command
cp -z
on an Oracle online manual, but this apparently does not work in the macOS terminal.
Any idea?
There is no way to leverage ZFS for this using any of it's features other than send/receive. Unless you are transferring an whole fs or volume snapshot (full or incremental), ZFS can't help you.
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I just needed a old file i deleted a few days back and I googled and got pandora recovery tool.
I was wondering how I can recover an item after deleting it from recycle bin.
After i delete a file how can it be restored ?
A delete operation only doesn't remove the files from hard disk but those files are still there until some other file replaces/overwrites the previous file.
A common misconception is that the data is actually removed from the hard drive (erased) when you delete a file. Any time that a file is deleted on a hard drive, it is not erased. Instead, the tiny bit of information that points to the location of the file on the hard drive is erased. This pointer, along with other pointers for every folder and file on the hard drive, is saved in a section near the beginning of the hard drive and is used by the operating system to compile the directory tree structure. By erasing the pointer file, the actual file becomes invisible to the operating system. Eventually, the hard drive will write new data over the area where the old file is located.
There are so many open source software to undelete a file from
MiniTool Power Data Recovery (Free Edition)- http://www.powerdatarecovery.com/download.html
You can recover upto 1 GB
Recuva - http://www.piriform.com/recuva/download
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I was encountering Error 1001 while un installation of an application from my Windows 7.
not my error snapshot.but it was same.
I tried to search for solving this problem but wasn't able to find a easy and satisfying answer.
But a friend of mine resolved this error.
By formatting the partitioned but un-formatted drives of my windows.
Actually recently did partitioning of my local drives and installed a fresh version of windows but didn't formatted and used the local drives. So they were contributing somehow in error.
So I formatted these drives and then un installed the application.It was successfully installed.
I shared this with all of you because may be it help you. And somebody help me in understanding the real cause and solution of this problem.
If I am to understand you correctly, you partitioned one of your drives, installed a fresh OS, attempted an uninstall, failed, and resolved the issue by formatting.
Chances are that the application you were attempting to uninstall was somehow involved with the area you partitioned. Possibly it was from attempting to read from files that were suddenly non-existent since that portion of your hard drive was then mapped as a separate disk. Additionally, it could that your lack of formatting left important configuration files, which were seen by your application, but contained data relating to your old operating system.
If you left the old operating system in tact, it may be that you essentially "confused" the application with regards to which operating system files to interact with.
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Closed 3 years ago.
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I'm trying to change a folder to read and write but everytime i check it again its read only
the folder is the oracle db home. When i untick read-only it it applies it but when i press ok check it again it's read-only
anyone know a solution?
i've got windows xp
The read-only attribute on folders doesn't actually mean the folder is read-only.
It doesn't mean anything much at all to the filesystem but it is used by the Windows shell, and maybe other applications, as a tag. For example, the Windows shell will only look for a Desktop.ini file if a folder has the read-only attribute set. (Thus the attribute allows it to avoid the lookup if it is missing, since the lookup can be quite slow on network drives.)
Unless you have a reason to care about the attribute the solution is to ignore it and let whatever is setting it have its way. It's probably setting it for a reason.
On the other hand, the read-only attribute on files is significant.
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Is it possible to limit a folder size in Windows so that when a user tries to write to the folder when it is full he receives an error message?
Keep in mind that Disk Quotas are per user not per folder, there are other solutions that will allow you to lock down a folder size regardless of user, my experience has been with Veritas Storage Exec, but it seems to be discontinued.
Do you mean disk quotas as described at, e.g. http://www.windowsnetworking.com/articles_tutorials/Configuring-Disk-Quotas-Windows-2003.html?
Have a look at Quotas for NTFS file systems..
The Windows Server 2008 Administrator's Companion recommends using the File Server Resource Manager instead of the older "disk quota" feature since these allow per-directory settings. (I'm not familiar with this tool myself; after 5 mins of playing around with it, I still have no idea how to actually do this. There certainly is a column for "quota", however.)
Another trick is to create a new volume and then use a symbolic link (see MKLINK) to map the directory to that volume. (MKLINK is Vista/2008 and later; for XP/2003 use NTFS junctions.)
It depends on how limiting you want to be. :)
For example, it's not difficult to write a program that listens/monitors a folder and displays a message box error/warning in case the user exceeds his quota. But that doesn't prevent him from exceeding it - just notifies him he did so.