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In Reply to: RE: To NAS or Not to NAS-More RPI adventures posted by Batman on May 18, 2017 at 13:11:45
Was your question properly answered? As best I can tell, the lowest response on the thread from BH was the only credible one. Thank goodness for BH.
he never answered my question which pertains to performance:
My music files are on a USB HDD attached...
Someone else took it in another direction.
Speed has never been an issue. Besides streaming my music from LMS, I also stream it using Fubar from that computer to a small system in that office. No buffering no dropouts. Likewise no issues streaming music via LMS either WiFi or Ethernet either. Don't see why speed would be an issue.
On the other hand the HDD is a NAS drive in a fan-cooled enclosure rather than being inside the computer's case. We all make tradeoffs.
Yes, Will my question was answered, first by BH, I've ordered another RPI and will make an RPI NAS this weekend just for kicks. Cut-Throat also answered my question and I'm waiting to see if I can find a Synology NAS on sale. I already bought an HGST NAS drive to put in it.
The rest of the thread got hijacked several times but it was entertaining.
Thanks for asking :-)
It was very entertaining. These guys are like Outside/Watercooler only they are friends and very good natured.
You make life easy for all BM: you shall receive a RP for every occasion coming up...birthday, anniversary, Christmas, V day.
I will pass on to all your family "just get him a Rpi, he loves them!" Metal cases, plastic ones, power supplies. Better than an antique car.
when I look back, my question was based on this observation of yours:
No matter how I enter the parameters into Volumio it can't mount my music drive.
Internal drives shouldn't have any *mount* issues.
Good luck with your new NAS!
I guess I couldn't read between the lines
"Or, why must you use a "USB attached" one as opposed to that which is a necessarily faster approach? "
I'll try and see. There is an internal drive with music as well.
high capacity SSD drives will be affordable and eliminate current considerations of physical space, power requirements and environmental noise.
All of my world lives inside a 2 TB space. Since the cost of an SSD with that capacity is around $700, I use a 120 GB SSD for the OS and rely on a 2.5" spinning rust drive for data. In two year's time, the price should be more like $200.
Speed can be relevant for copy and backup purposes, but perhaps my mention clouded the issue I was trying to address.
OS and apps reside on a 250 GB SSD and files reside on a 1TB "rust" drive (I like that term!).
But are SSD reliable enough to be used for storage eventually? I though they had only so many seeks?
But are SSD reliable enough to be used for storage eventually?
You are correct as their life is measured in the number of writes. Which is why I configure my browsers to store their temporary files on the hard drive to reduce that constant traffic.
Fortunately, modern SSDs are pretty reliable. I keep an imaged reserve unit on the shelf for when mine dies. :)
I'm on to using the SSD's with a 5 year warranty. They command a bit of a cost premium but this one I have now seems more rugged than what I'v had in the past. I'm not sure exactly what I'm doing that has killed 3 configured as my C drive so far in about 5 years or so. I do a lot of LTSpice though. I suspect it's something related to that.
Most modern SSD's and filesystems are a lot better than they were just a few short years ago. I no longer concern myself with a normal amount of writes from the OS and applications writing into logs and temp files. Of course I wouldn't run a "write test" all day long as that wouldn't be "normal".
There are four common types of NAND flash used in SSD's, differing in number of P/E cycles per lifetime, and defined by their construction:
SLC -- Single Level Cell: the most expensive, longest lived (high P/E), and generally fastest. Bits are stored only as 2 voltage levels, or a "1" or "0." In SLC less data is stored per cell, so the per unit storage cost is higher. SLC is ridiculously expensive and has fallen out of favor in IT data center applications. It's still used in highly specialized applications.
eMLC -- Enterprise (grade) Multi-Level Cell: is MLC with longer life, usually because of an advanced controller operating the cell and error recovery techniques, construction density, or some combination of the two. These often allocate more cells for wear leveling than MLC.
MLC -- Multi-Level Cell: is consumer grade and used in phones, cameras, and USB sticks, laptops, etc. The stored charge in MLC may be interpreted as a variety of values, 0 to 3, or 4 possible states, and may store 2 bits. With shorter lifetimes, usually 10x less than SLC, the advantage of this memory is that the cost is several times less than SLC, but with lower write speeds. MLC typically uses some form of error correction code per block.
TLC -- Triple Level Cell: championed in some Samsung models, TLC has higher power and error correction requirements, and higher wear levels. TLC is targeted at environments with predominant read uses, and has not been commonly used. Samsung makes excellent MLC and eMLC SSDs but they also have their "cheap line" of TLC based SSDs.
We use eMLC in the data center. I use MLC SSDs in my computers. TLC is the cheapest but I wouldn't use TLC in any of my computers or music servers.
which has a 75 TB / 5 year warranty.
That should suffice until the high capacity ones become cheap. :)
I have an older Samsung 840 Pro purchased and installed April 2013 in my Mac Mini music server. The Mac remains powered ON pretty much 24/7 and haven't had a single issue with it.
Also bought the EVO 850 for a friend's laptop around June 2015. His HDD died and the EVO 850 was a nice replacement and speed-up for him.
I'm also waiting for those 2TB - 4TB SSDs to come down in price.
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