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Funny you mention this.
The first thing I did was mounted the backup USB in a way that ONLY the NAS sees it, and has access to it. So something running on a PC Cannot naturally see the extra drive out there!
The next step, and I am just starting this... I attached the second network adapter with a different IP Address... In my hosts file, I have given it a completely unique name. My goal is a startup/shutdown script for my backup software that establishes the connection, then the backup runs, and then I disconnect. In this case, using "More secure" Credentials.
This creates a WINDOW in which the files can be accessed by ransom ware.
I am also looking at an S3 copy to run after my backups, so it is offsite and it won't overwrite existing files.
I have, like many people, heard horror stories...
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I also have a Synology 4-bay running WD HDD's with no problems for over a year so far. In addition to backup to local drive, I would really look into also using an offsite cloud backup service for the NAS as well. To be protected from theft/local disasters. I currently use CrashPlan, but with them ditching their personal accounts, I'm moving over to iDrive.
What ever your cloud backup provider is, make sure it does file revisions. This will prevent ransomware from knocking out your local drive and your backups. Crashplan supports individual file histories, and so does iDrive, not many other backup services do, so check. But if your drive gets encrypted, and that gets backed up, it's not a problem with these 2 services, as you can just restore from a date prior to the ransomware attack and you have your original data back. Plus these options support real-time backups as well. With Crashplan, file revisions get backed up every 15mins if there are changes (maybe less if I want it to). And any of those versions are recoverable.
I don't worry about my data anymore with the redundancy of the Synology NAS, plus off-site backup solution. And it satisfies the best practice of 1-2-3 backup plan (at least 1 local backup / backup to at least 2 different physical locations / at least 3 copies of all data).
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WD External HDDs.Last for ages
Caveat Emptor.
"Progress doesn't come from early risers – progress is made by lazy men looking for easier ways to do things." Lazarus Long
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Now I have a couple of WD internal HDDs and they work very well... let's see what can I find to make the backups...
Thank you for your post.
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I'd have to say my experience with Seagate drives is fine: my NAS has 4 * 4TB Seagate drives (ST4000DM000-1F2168) organised as RAID 5 that have run 24/7 since early 2015 and - so far - no problems at all.
My USB (air gapped) image backup drives are also Seagate and are all fine as well - I can't remember when I got them, but they well and truly predate the Seagate NAS.
In fact, the only HDD failures I've had in the last 15 years have all been Maxtor drives of various sizes.
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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OriginalGriff wrote: I'd have to say my experience with Seagate drives is fine
...
In fact, the only HDD failures I've had in the last 15 years have all been Maxtor drives of various sizes.
Maxtor - Wikipedia[^]
Quote: In a deal worth US$1.9 billion, Maxtor was acquired by its rival Seagate in 2006. The Maxtor brand is still in use by Seagate
Hmmm, seagate good / maxtor bad ???  
Signature ready for installation. Please Reboot now.
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I remember years ago to have a failure in a HDD from an HP server... a super expensive SCSI drive at 15K rpm... I got it replaced by an official HP drive... which was exactly a MAXTOR drive with an HP sticker... 
Never again it failed, but well, I paid almost twice its price for a sticker... 
Till today I've been very lucky with HDDs, but I thought asking here first...
Thank you for the answer!
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Joan M wrote: I own a NAS that has a total capacity of 6TB.
If you don't mind my asking, what do you have for a NAS device? How are backups performed / maintained on it?
I ask because I just bought a cheap NAS to house my random junk, and its backup mechanism is very limited.
Common sense is admitting there is cause and effect and that you can exert some control over what you understand.
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I like Hitachi Touros. They (well mine, bought some time ago) came with little caring cases.
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A double bay Synology.
The backups are being done by they hyperbackup solution to an USB external HDD.
They have a versioning system that is great to access different states of the files you are interested in recovering.
The biggest problem is that it seems they are not capable to handle multiple drives to make backups.
This means you are forced to create n backup tasks (n => one per external disk) and program them to use a specific external disk... this is giving you a failure each day (for the missing disk).
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Well sounds like the Synology has a lot more in the way of features than the Buffalo.
While Buffalo has a backup mechanism its very limited.
Thanks for the info, I will have to look into one of those.
Common sense is admitting there is cause and effect and that you can exert some control over what you understand.
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I've been using a D-Link DNS320 (2 bays, max of 3TB discs) (Ethernet) for a few years. It has not had any problems, even though I had been using second hand 1TB discs, but have bought 3TB as I was running out of room. Also, my Acronis backup s/w was up for renewal; so I have followed advice seen over the month to use AOMEI. Thus far, AOMEI looks good - it is different from Acronis. I quite like (but not got used to) the fact that you can open backups as local drives (somewhat more long-winded that the Acronis method of double-clicking the required backup file). I've not been using it long enough to get a feel for how it deals with saving old backups. I am using the free version; thus far, the only Acronis feature that I have used that AOMEI doesn't have is email notifications and one-step cloning (you can clone in two steps and both feature are available if you get the paid version).
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A very interesting source of data here: Backblaze [^]
This is not their first report, similar data is available going back a few years, IIRC.
TL;DR You can't go just by manufacturer alone.
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I have noticed that some responders have provided negative views of the Seagate Drives.
I have primarily used Maxtor (I believe Maxtor has been absorbed by Seagate.), Seagate, and Western Digital drives with the majority of my machinery.
I have never had a problem with any of them.
However, to be fair to those who do not like certain drives, one should consider the following...
The drive manufacturing industry goes in cycles like any other industry. However, with drive production a certain vendor can produce superior drives for many years and then suddenly put out a "dog" as a result of many factors such as attempts by R&D to create a new technique for data storage, a lowering of demand for a particular drive type, popularity shifts, etc.
If any one such vendor were to continuously put out bad drives over the long term, they would have been out of business by now. So my advice, is to select a drive type that fits your requirements and then select one such drive from the major vendors still manufacturing such hardware.
If you buy a drive from such outlets as MicroCenter Online, for practically all vendors, it will come with a 30day return guarantee. If you have concerns that may go past the 30days, you can purchase replacement insurance for an affordable fee.
Steve Naidamast
Sr. Software Engineer
Black Falcon Software, Inc.
blackfalconsoftware@outlook.com
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I used to love Maxtor drives. Never had a problem with one (we are talking way back in the day). I think toward the end, the reliability might have went down, and I don't personally think their reputation followed them to Seagate when they were absorbed. I don't care for Seagate personally. I normally go with WD drives, but don't have the brand loyalty as I did with back in the 90's with Maxtor.
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One thing you could consider is using data compression on the data on your drive to possibly extend it's usefulness a bit further before looking for another drive.
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Actually I am totally uninterested (not disinterested as is now commonly used). However there was a time when grammar like in the above message title would alert one to a scam. Now I'm not so sure. It could be from Apple. Who knows, who cares.
Peter Wasser
"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell
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I would say let time do its job...
"The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge". Stephen Hawking, 1942- 2018
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Quick! Open it! It might be important!
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
AntiTwitter: @DalekDave is now a follower!
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Why hasn't it been deleted yet?
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I would only worry if it was from a Nigerian Prince...
<sig notetoself="think of a better signature">
<first>Jim</first> <last>Meadors</last>
</sig>
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AIUI, a chess engine uses some sort of minmax algorithm, but a minmax algorithm would search for a path that guarantees the least worst option - and since a chess engine assigns integral points for pieces, it seems that the score should be some integral value. What's going on here? (I presume that there must be a few folks here that are in both the set of chess players and the set of folks who do artificial intelligence.)
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Most of the time it is just a little guy in the box that does the moves 
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