Synology DS
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Synology DS
can anyone advise if the synology DS particualy the later models DS215J will read an OS Extened Journeled External HD.
I'm looking at buying one. All my pics are on an OS external Journeled HD, I don't need to be able to write to it from the NAS but every now and then plug it in and do a periodic backup from it to the NAS.
Thanks in advance.
I'm looking at buying one. All my pics are on an OS external Journeled HD, I don't need to be able to write to it from the NAS but every now and then plug it in and do a periodic backup from it to the NAS.
Thanks in advance.
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Assuming I understand you correctly....
Irrespective of manufacturer, if its a RAID box, not a JBOD, then no, you're not going to be able to plug in A.N.Other drive (whether Mac, Windows or Linux formatted) and see it come up as an independent drive.
All you're going to do is bugger up your data when the RAID subsystem decides to adopt the newly inserted drive.
Of course, if the synology system has some special software on it, then I'm willing to be corrected.... however even if that were the case, I still wouldn't trust it.
You may be better off just synching your data from A to B on a regular basis.
Irrespective of manufacturer, if its a RAID box, not a JBOD, then no, you're not going to be able to plug in A.N.Other drive (whether Mac, Windows or Linux formatted) and see it come up as an independent drive.
All you're going to do is bugger up your data when the RAID subsystem decides to adopt the newly inserted drive.
Of course, if the synology system has some special software on it, then I'm willing to be corrected.... however even if that were the case, I still wouldn't trust it.
You may be better off just synching your data from A to B on a regular basis.
Thread Starter
Wasn't thinking of the RAID issue.
I was just trying to ascertain if it will be able to read OS Journaled formatted Hard Dives. I know you can plug another USB say NtFs into the NAS and be able to acsess the HD. But have read on various places that it can't acsess OS journaled format. But I have also read it can read just not write to OS Journeled.
The RAId issue is intresting. I just assumed you set it up to say Disk 1 mirror onto Disk 2 and therfore plugging in another disk it wouldn't have a fit but your right depending on th way it does it it may corrupt the Raid copy.
I was just trying to ascertain if it will be able to read OS Journaled formatted Hard Dives. I know you can plug another USB say NtFs into the NAS and be able to acsess the HD. But have read on various places that it can't acsess OS journaled format. But I have also read it can read just not write to OS Journeled.
The RAId issue is intresting. I just assumed you set it up to say Disk 1 mirror onto Disk 2 and therfore plugging in another disk it wouldn't have a fit but your right depending on th way it does it it may corrupt the Raid copy.
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Normally it should ask you what to do with the disk before wiping it. And it probably will be able to read the type of volume you describe, but it may well not be able to write to it.
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Googlebug,
You're wanting to use RAID as a disk cloning tool. That's not what its intended for, you need a cloning tool for that (or a RAID array in JBOD mode, where the individual physical drives are passed through to your computer to deal with instead of the RAID controller ).
RAID does what it says on the tin .... Redundant Array of Inexpensive Disks.
The word Array being the important one. With RAID you have to adopt the thinking of logical drives, not physical ones.
The physical drives are not formatted, RAID operates in terms of data blocks, it doesn't care what the blocks are, it just uses algorithms to achieve redundancy of said blocks. The physical drives are intended to be readily disposable, i.e. they serve no design purpose other than providing the necessary capacity and redundancy.
The formatting happens at logical level.
Thus, on a half decent RAID array, what will happen is :
- If you pull out a live drive, it will assume the drive died (even if you turn off the RAID controller first, because it will keep track of drives in NVRAM). It won't ask you anything, it will assume and get on with the job.
- If you put in a "new" drive where the "dead" drive was, it will assume you've replaced a dead drive and will adopt it, format it and add it to the array. It won't ask you anything, it will assume and get on with the job.
- If you put a "new" drive into a previously unused slot, it will do nothing. But your only options will be to create a new logical drive or expand your existing logical drive.
Therefore, whilst you can configure mirroring (RAID1), you have to remember this operates on a logical drive level (i.e. the underlying drives are mirrored and you are presented with one logical drive). And the mirroring occurs within the confines of the RAID algorithm, and hence subject to common drive replacement protocols mentioned above.
You're wanting to use RAID as a disk cloning tool. That's not what its intended for, you need a cloning tool for that (or a RAID array in JBOD mode, where the individual physical drives are passed through to your computer to deal with instead of the RAID controller ).
RAID does what it says on the tin .... Redundant Array of Inexpensive Disks.
The word Array being the important one. With RAID you have to adopt the thinking of logical drives, not physical ones.
The physical drives are not formatted, RAID operates in terms of data blocks, it doesn't care what the blocks are, it just uses algorithms to achieve redundancy of said blocks. The physical drives are intended to be readily disposable, i.e. they serve no design purpose other than providing the necessary capacity and redundancy.
The formatting happens at logical level.
Thus, on a half decent RAID array, what will happen is :
- If you pull out a live drive, it will assume the drive died (even if you turn off the RAID controller first, because it will keep track of drives in NVRAM). It won't ask you anything, it will assume and get on with the job.
- If you put in a "new" drive where the "dead" drive was, it will assume you've replaced a dead drive and will adopt it, format it and add it to the array. It won't ask you anything, it will assume and get on with the job.
- If you put a "new" drive into a previously unused slot, it will do nothing. But your only options will be to create a new logical drive or expand your existing logical drive.
Therefore, whilst you can configure mirroring (RAID1), you have to remember this operates on a logical drive level (i.e. the underlying drives are mirrored and you are presented with one logical drive). And the mirroring occurs within the confines of the RAID algorithm, and hence subject to common drive replacement protocols mentioned above.
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Hi Googlebug,
The Synology DS series didn't read external HFS+ drives a couple of years ago, so I'd guess they still don't. Some people hacked in HFS+ support (I was one of them) but it wasn't a fun experience.
Edit: Well hey, these guys reckon you're good to go for read only since DSM 4.2 and higher support HFS+, but you need to disable journaling for read/write (it's from 2013, so maybe the situation has improved further: not as of 2014). Maybe I should have kept mine :-) I'll stop here because I've gone from personal knowledge to Google-foo.
The Synology DS series didn't read external HFS+ drives a couple of years ago, so I'd guess they still don't. Some people hacked in HFS+ support (I was one of them) but it wasn't a fun experience.
Edit: Well hey, these guys reckon you're good to go for read only since DSM 4.2 and higher support HFS+, but you need to disable journaling for read/write (it's from 2013, so maybe the situation has improved further: not as of 2014). Maybe I should have kept mine :-) I'll stop here because I've gone from personal knowledge to Google-foo.
Last edited by Bushfiva; 15th May 2015 at 03:25.
