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TrueCrypt container
Hi
I currently store a few TrueCrypt containers on my ReadyNAS 316. I use TryCrypt to mount these containers when i wish to copy/paste additional files into the container. This has always worked fine. Once i've mounted the container in Windows, i can navigate/copy/use files within the container as usual (windows mounts the container as a new drive in Windows).
However, overthe last few days, copying any new file to the container stored on the NAS suddenly dropped to extremely slow speeds. Every time i copy a file to the mounted container, the speed drops after about 3 seconds, to fluctuate between 0KB/s and approx 700KB/s. This happens whenever i copy a file from Windows to the container on the NAS, and also when i copy/paste files already stored in the TrueCrypt container. This makes copying large GB files to the container near impossible. Copying files to NAS works fine, its only when copying to/within a TrueCrypt container.
Does anyone have any ideas why this may be happening all of a sudden?
I have a new local build of the SMB Plus app that adds an option for this setting. Get it from here, and install from the Apps tab, using the Upload button. Then launch the SMB Plus app, go to the Write Options tab, and disable Strict Sync.
We plan to make this a per-share option in a future firmware release.
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Are you are using dynamic containers, or static ones, and is CoW (Copy on Write, aka BitRot Protection) enabled for the share? I only use static containers and have not run into this, but I can see how it could become a problem on a CoW system to expand a very large file like a dynamic TrueCrypt container. Using static containers reserves all the required space up front, which makes it contiguous and precludes the need for future expansion. But some users do not want to reserve a lot of otherwise unused space. I do, because I use different containers for backing up different PC's and since OS6 still does not have share level quotas (that OS4.x did 10 years ago!!), it's the only way I can use "disk space" as the key to trimming old backups where each machine has it's own specified space available.
If you want to use dynamic containers, you definately want to have CoW disabled on the share.
BTW, TrueCrypt is a bit old in the tooth; you should probably look at VeraCrypt.
Thanks for the reply.
I use only static containers. In fact i've used the same containers for a long time. Only recently did i start having this issue. I checked CoW also, and the share definitely has is enabled.
I also tried VeryCrypt as suggested. Did a fresh install and created a static 3GB container on the NAS. The same issue occurs. Copy speed starts of about 40 MB/s and immediately begins to drop to below 1MB/s. Extremely frustrating.
What firmware are you running? Do you use NIC bonding?
Are snapshots disabled on the shares the container is in?
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