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Moving one share to another with cp --reflink
Hello, Having reset my nas. I've reloaded all the data and I felt something wasn't right. Couldn't put finger on what was niggling me. I've now discovered what is different. Before I reset, all my media files were in the share "Media". That is all the music, ebooks, pictures & videos. Now I can see that all this stuff are in their owns shares, which means my networked media players have to have a link to each share. I can't do this. So I need to move these extra shares to the New Media share (which I have since renamed to "Entertainment") to avoid getting muddled up with the media directory that is used for mounting the USB drives. When done delete the old shares (Destroy). I have found that I can do this with "cp --reflink" instead of "mv". But before I do this, I want to make sure that I have understood what I'm doing and is the correct way. Is see that there are a few arguments that can be add to cp -reflink, but what are they and which do I need? Any other thoughts? Thanks Ian B.
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I have done it, though I did delete the file(s) from the original location before I destroyed the volume. It may not have been necessary (really shouldn't be), but I thought it best to do so.
ipb_uk wrote:
that there are a few arguments that can be add to cp -reflink, but what are they and which do I need?just -r (recursive) and -p (preserve). BTW, you need --reflink, not -reflink.
ipb_uk wrote:
Any other thoughts?Snapshots won't be copied, so you will lose them when you destroy the original share.
StephenB wrote:
ipb_uk wrote:
that there are a few arguments that can be add to cp -reflink, but what are they and which do I need?Doh! Blimey Ian two typos in one line. I'll have a serious talk with my fingers!
Take two " added to cp --reflink".
Anyway lets see if I can get my finger working right (yep I'm embarrassed).
I did find --reflink=always & --reflink=auto. Which prompted my question. Are there more? Do i even need these switches? And what is the difference? As I'm not sure what the help file meant.
"When --reflink[=always] is specified, perform a lightweight copy, where the
data blocks are copied only when modified. If this is not possible the copy
fails, or if --reflink=auto is specified, fall back to a standard copy."I'll give it a go tonight without any arguments added, on a small folder.
ipb_uk wrote:
"When --reflink[=always] is specified, perform a lightweight copy, where the
data blocks are copied only when modified. If this is not possible the copy
fails, or if --reflink=auto is specified, fall back to a standard copy."I've always entered --reflink w/o the parameter. I believe it defaults to auto (which is what you want), but explicitly using--reflink=auto should be fine.
Make sure that Copy-on-Write is enabled on both the source and destination shares before you do the copy.
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