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18

For future reference: after way too many hours researching and debugging this issue, I finally discovered the root cause. The OpenSSH version used by Synology is a highly customized version, that does not behave like the original code. It has lots of hacks and ad-hoc customizations - e.g., additional checking before accepting a login to see if the SSH ...


7

Apart from Favourites list have you checked if the volumes are listed in Volumes and Devices tab in iSCSI initiator properties? And are they set to Auto Configure? This should (in theory) make sure that all volumes are initialized. Source


6

To circumvent the problem, and since I installed bash via ipkg and I can't be sure /opt will always be available (mounted correctly), I simply put the following in my .profile [ -x /opt/bin/bash ] && exec /opt/bin/bash while /etc/passwd contains /bin/ash as shell.


6

rsync doesn't do SFTP. From the man page: There are two different ways for rsync to contact a remote system: using a remote-shell program as the transport (such as ssh or rsh) or contacting an rsync daemon directly via TCP. SFTP doesn't give you a shell, ergo it doesn't work for rsync. You'll need an SSH connection instead. Once you've ...


5

It looks like the system splits up each drive into as many partitions as needed to create a series of RAID5 and/or RAID1 arrays that minimize the amount of unused space on the drives. Those RAID arrays then become physical volumes under LVM, which, in turn, presents all that storage as a single logical volume. Current versions of mdadm do allow you to add ...


5

You can install dstat as a replacement for iostat dstat - 0.7.0-1 - dstat is a versatile replacement for vmstat, iostat, netstat, nfsstat, and ifstat You can install it by using ipkg which allows you to download other tools as well. See the following links: ...


4

you need to ssh to the synology using root account with your default GUI password. go to directory /var/packages/Tomcat/target/apache-tomcat-6.0.36/conf/ edit the file Tomcat-users.xml stop and restart Tomcat server now can login with your new account


4

No there wont be any down time, this really is a standard thing to do now in enterprise, where always up availability is key. LVM does this expansion in the background and it is pretty much instant, it wont have any effect on services, I do this once or twice a week on my estate and haven't had a problem yet


3

No the existing data will not be erased when you add a disk to the SHR array. The message is simply saying the new drive being added will be formatted. Your data and applications will actually remain available during the expansion process; there is no need at all to even stop using the NAS whilst SHR Vertical Expansion is taking place. That said - before ...


3

You can change the login shell by editing /etc/passwd. Each line is a list of colon-separated values, the last of which is the login shell: user:x:1000:1000:User:/home/user:/usr/bin/zsh If /etc/shells exists, you should add zsh (full path) to it, else some services may not work for your user. Note: I'd suggest against changing the login shell for root ...


3

First: DON'T ever use a RAID5, especially not with disks that size. The reason is that it's very likely you end up with an error during a rebuild after a failed disk, which will make the array a total failure. To your questions: one hard drive crash I can replace failed disk with a new similar one and embedded software will rebuild the entire system ...


3

Raid 5 is a good compromise between protecting you from data loss and capacity efficiency. However, Raid 1 read performance is better if that matters you. Even when using Raid, you should consider using a good backup solution. Using any Raid level as opposed to backup does not protect you from accidentally/intentionally removed files. I think it is ...


3

You will want to confirm that the model you are interested in can present iSCSI sessions to the number of ESXi boxes that you need to support. Other possibly concerns - single Gigabit interface, slower CPU's\Controllers and thus throughput. The 810+ looks to be capable of supporting about 100Meg/sec sequential write \ 80-100 write IOPs with 4 disks in ...


2

As far as where you would find the folder path (/volume1/vms), its at the bottom of the NFS Privledges window in DSM.


2

RSync uses something call a 'module name' it's kind of like a 'share name' (for windows). The Synology's default 'module name' for RSync is NetBackup (I assume it's case sensitive). So if you change your command it should work: From: c:\cygwin\bin\rsync -avz /cygdrive/e/Lisa/ Lisa@192.168.1.10:/volume1/homes/Lisa/Backup To: c:\cygwin\bin\rsync -avz ...


2

Your drive overheated at some point in the past. 190 Airflow_Temperature_Cel 0x0022 061 038 045 Old_age Always In_the_past 39 (0 4 43 37 0) Unfortunately it's not possible to be 100% sure of the exact temperature that it reached, only that it was quite a bit beyond the vendor's defined threshold. Though it's most likely that the normalized ...


2

Yes, I have done this. At least, I have removed all the drives, and put them back in, and powered up without data loss. I have not swapped drives in the middle.


2

It seems to me that you're happy with rsnapshot but not with tar. If so, the solution is to replace tar with something that preserves the 'only changes' of rsnapshot. Out of my head, I can thing of two easy options: after rsnapshot, find the differences between the last and previous snapshots to store only those to a tar file. It could be simply diff, ...


2

You either have an IP conflict (likely) or a MAC address conflict. There is no other reasonable way for this to occur. If you really can't find the IP conflict, try sending out an arping to the target IP address using the arping utility for linux, or something like that. Watch what comes back. If you want you can even run wireshark and watch the traffic. ...


2

I cannot say specifically, however - if you add a disk to a RAID config, it'll need to be wiped to become part of your RAID. Losing that data is - as you surmised - inevitable. When it comes to the original data though, the answer is a little more complex - RAID, depending on type, will differ in where it writes data in a two drive configuration, as opposed ...


2

you can do this by adding the following to your sshd_config DenyUsers username@host for example when you want to ssh acces from the 80.25 ip-range for root: DenyUsers root@80.25.* From the manpages: The allow/deny directives are processed in the following order: DenyUsers, AllowUsers, DenyGroups, and finally AllowGroups.


2

You can change this in your DSM Control Panel. Under Connectivity > Network > DSM Settings you can set the ports. Obviously, make sure that if you have another webserver running on your NAS like Apache, it doesn't listen on those ports.


2

In short, yes... you would have a problem with RAID6 and using a smaller drive. RAID6 itself has no way to dynamically re-size the RAID to a smaller disk. You must either: have a RAID controller capable of dynamically resizing the RAID volume copy your data elsewhere, and completely rebuild the RAID and then restore the data back to the volume. I have ...


2

I think hibernation would be more risky than just leaving the disk spinning simply because you are exercising the motor more. Steady state should be more reliable. However I can't find any studies supporting the theory.


2

The documentation says they are good for 600k load cycles with a 3 year warranty. 600k/(365*3) ~= 548 That is ~540 stop/start cycles per day. That sounds ok for me for normal power cycling as described.


2

The problem stems from a race condition between drivers, dummy-ups starts and attempts to connect to usbhid-ups before usbhid-ups has finished initializing. As explained on the NUT Users mailing list, in versions of NUT later than 2.7.2, this can be addressed by using the maxretry and/or retrydelay global directives in ups.conf. For versions of NUT ...


2

To answer your questions: RAID5 is not advisable, period. A single bad read during a rebuild kills your entire array. This is more of an issue with HDDs than SSDs, but it's still a consideration. RAID10 is generally the best option, but RAID6 (dual-parity) can also do quite well. You're comparing Jaguars to Hyundais, there. SSDs have better random access, ...


2

Mount the Synology volume from a Linux workstation running Gnome, and run Disk Usage Analyzer on it.


2

Try so see what iptables modules are loaded on the good machine and compare them to the bad one: # cat /proc/net/ip_tables_matches state icmp recent multiport multiport udplite udp tcp Also check if the REJECT target exists: # cat /proc/net/ip_tables_targets REJECT MASQUERADE DNAT SNAT ERROR If you do not see REJECT in the list, then your version of ...



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