Backup File Server to DAS


  • Banned

    @Dashrender said:

    In other words you're suggesting only the 2 disk models? Otherwise a commodity server is more cost effective?

    Well you can pick up used 16Bay SATA/SAS servers for around $100-$200 on ebay.



  • @Jason said:

    DAS also means if you get something like cryptolocker on the fileserver then it will likely mess with your daily backups. I hope you have off site backups too.

    And to be clear, by DAS here he means all block devices as I mentioned above. Anything that appears to the system as a local disk is 100% vulnerable to ransomware like cryptolocker. There is a reason that local, always attached disks are not used for backup devices generally.

    NAS will protect you from this as there is a ton more security and protection.



  • @KOOLER said:

    Don't go for Drobo! They apply mods to Linux so you'll have hard times recovering data back from their devices. Been there done that (c) ...

    Modify Linux? They don't even run Linux!



  • @scottalanmiller said:

    @Jason said:

    DAS also means if you get something like cryptolocker on the fileserver then it will likely mess with your daily backups. I hope you have off site backups too.

    And to be clear, by DAS here he means all block devices as I mentioned above. Anything that appears to the system as a local disk is 100% vulnerable to ransomware like cryptolocker. There is a reason that local, always attached disks are not used for backup devices generally.

    NAS will protect you from this as there is a ton more security and protection.

    NAS will protect you from this only if the NAS isn't mapped. Most ransomware will walk standard shares today too.
    So if your NAS has to be mapped into the OS before the backup software can run, hopefully you can create a script to map/unmap it as needed.



  • hhhh i can see many choices and suggestion here,
    what i want is only to make sure whether my windows server 2008 R2 will consider DAS as local partition so that i can make daily schedule backup (not overwrite the previous backup version but rather append the changes and keep daily version backups)



  • @IT-ADMIN said:

    hhhh i can see many choices and suggestion here,
    what i want is only to make sure whether my windows server 2008 R2 will consider DAS as local partition so that i can make daily schedule backup (not overwrite the previous backup version but rather append the changes and keep daily version backups)

    Yes, DAS, not NAS will do what you want.



  • @Reid-Cooper said:

    Have you considered not using the built in Windows backup but instead using something for free? I'm not 100% sure on the features or limitations to Crashplan but I know that they are completely free and do some really cool stuff. And since they are free you could download it and test it all that you want. If it isn't better than the Windows Backup you could just switch back, no money lost.

    http://www.code42.com/crashplan/features/

    They list local drives (external hard drive) as a backup option.

    windows backup also offer these option (local and external HD) but for the external HD they don't keep old version backup but rather they overwrite each time the previous backups
    for this reason i want an external HD but still considered by windows as local



  • @IT-ADMIN said:

    what i want is only to make sure whether my windows server 2008 R2 will consider DAS as local partition so that i can make daily schedule backup (not overwrite the previous backup version but rather append the changes and keep daily version backups)

    Yup, and that is answered. Without question, Windows has no means to determine if it is local or not local. It's block that you are asking about, not local. Windows doesn't have a concept of local or network, only block or file.



  • @IT-ADMIN said:

    windows backup also offer these option ...

    That's why he recommended a free alternative. Any reason that you are only looking to use Windows' limited backup options?



  • @scottalanmiller said:

    Windows doesn't have a concept of local or network, only block or file.

    so how they know network shared folder ?? is it because they use SMB protocol right ??



  • @IT-ADMIN said:

    @scottalanmiller said:

    Windows doesn't have a concept of local or network, only block or file.

    so how they know network shared folder ?? is it because they use SMB protocol right ??

    Correct, Scott listed the two types above. Block and Network



  • oh great
    what a about NAS ? is it considered local or network ??



  • @IT-ADMIN said:

    @scottalanmiller said:

    Windows doesn't have a concept of local or network, only block or file.

    so how they know network shared folder ?? is it because they use SMB protocol right ??

    Yes, the tip here is "shared." DAS, SAN, local disks are not shared - those are block protocols. NFS, SMB, FTP are shared - they are file protocols.



  • @IT-ADMIN said:

    oh great
    what a about NAS ? is it considered local or network ??

    You went right back to local or network. There is no local or network, that is what is confusing you. There is only block and file.

    DAS and SAN are block. NAS and File Servers are file. Understanding NAS and SAN.



  • To get what you want, the ability to use Windows built in backup utility to get multiple days worth of backups, you have to use a block level protocol, which Scott already listed DAS, SAN or internal disks.

    But the rest of us were warning you of the potential issues with regards to ransomware viruii that can easily damage those volumes since they are constantly online and accessible to the server in question.



  • thank you guys very much, now i'm ready to go
    since i can acheive my goal with NAS, i will change my mind to buy a NAS, maybe i will need to backup other stuff on my network, since it is shared in the network
    i will not buy DAS anymore cuz it is limited to one machine



  • @IT-ADMIN said:

    since i can acheive my goal with NAS, i will change my mind to buy a NAS, maybe i will need to backup other stuff on my network, since it is shared in the network
    i will not buy DAS anymore cuz it is limited to one machine

    What backup software are you going to try out?



  • windows built in backup



  • @IT-ADMIN said:

    windows built in backup

    Then you are right back to square one - your backups will be limited to one day.



  • i have been using it for a long time, i think it is great
    the only limitation that i had is how to keep my backup externally
    now that i will buy a NAS, this problem will be solved 🙂



  • @Dashrender said:

    @IT-ADMIN said:

    windows built in backup

    Then you are right back to square one - your backups will be limited to one day.

    no, i will have daily version of my backups because windows backup can do this if the destination is a local HD



  • But a NAS is NOT considered local. NAS uses file protocol, so it will not work for your needs.



  • the limitation comes when you choose network shared folder
    2015-10-19_120313.png



  • To get what you want, you will have to use a DAS or a SAN. The only difference between DAS and SAN are the protocol you use to talk to the device. i.e. DAS = SATA or SCSI communciation, SAN = iSCSI or other block protocol.

    *edited for clarity



  • ooooooh i'm very very sorry i confused between NAS and SAN



  • in this case i will content myself with DAS, because as far as i can see SAN is the most expensive one



  • great, now i understand
    i made my decision, buy a DAS and connect it with my file server and i'm done 😉



  • @IT-ADMIN said:

    in this case i will content myself with DAS, because as far as i can see SAN is the most expensive one

    Well, that really depends. You don't have to do crazy expensive SAN. The Drobo 5n mentioned earlier might be perfect for this.



  • i think i will buy a RAID 1 DAS, what do you think ??



  • i want the cheapest option