BINGO!!! Alright, here is how this was resolved: I referenced this artice for unmounting the datastore, https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2004605 Step 1: Manually unmount the datastore from the host with this command: esxcli storage filesystem unmount [-u UUID | -l label | -p path ] In my case I just used the label command. Step 2: Verify that … Read more
There is already a RAID level for what you want; it’s called RAID 10. The MTBF for professional and consumer level drives has increased by an order of magnitude in recent years, the uncorrectable error rate has stayed relatively constant. This rate is estimated at 10^14 bits, so one bit per 12 terabytes read, for … Read more
There are many ways of handling data that size. A lot of it depends on your environment and how much money you’re willing to spend. In general there are a few overall ‘get the data off the server’ strategies: Over the Ethernet Like it says on the box, data is streamed to Some Where Else … Read more
You are confusing your units. M = mega m = milli B = byte b = bit When referring to disk usage, we measure throughput in megabytes per second, or MB/s. Notice the capital M for mega and the capital B for bytes. When referring to network performance, we measure throughput in megabits per second, … Read more
NAS Definitely not NAS for SQL Server. SMB/CIFS does not have adequate support for file locking to support a DBMS (at least it didn’t a few years ago, ca. 2002-2003). Note that NFS does and you can actually do this with Oracle on an NFS server. However, SQL Server on a CIFS share is not … Read more
A NAS (Networked Attached Storage) is a device serving files via the network. One protocol to accomplish this is NFS. So a NAS can use the NFS protocol (or another protocol). So a Linux server providing NFS exports is, in effect, a NAS device. Is there a good reason to pick a NAS filer over … Read more
One of the servers that I administrate runs the type of configuration that you describe. It has six 1TB hard drives with a LUKS-encrypted RAIDZ pool on it. I also have two 3TB hard drives in a LUKS-encrypted ZFS mirror that are swapped out every week to be taken off-site. The server has been using … Read more
We use Samba extensively, and I’ve always found it to typically be faster than NFS in almost all cases (and I only say almost because I haven’t compared them enough). From what I’ve seen after a couple of packet captures, the SMB protocol can be chatty, but the latest version of Samba implements SMB2 which … Read more
First of all, for a (broad) comparison of DAS, NAS and SAN storage see here. There are some common misconceptions about the term “SAN”, which means “Storage Area Network” and as such, strictly speaking, refers only to the communication infrastructure connecting storage devices (disk arrays, tape libraries, etc.) and storage users (servers). However, in common … Read more
I generally use one of the following two filesystems: XFS for anything which does not play well with CoW (or for virtual machines whose datastore already is on a CoW filesystem) or when extremely fast direct I/O is required; ZFS for anything else. For your use case I would use ZFS, especially considering that Ubuntu … Read more