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Server upgrade advice

artur9 said:
I'm no expert here but I think you can do that with a CoStar. It depends on whether you have a Kaleidescape disc player of some sort (M500, M700, Alto).

If your vaults are M700 and not DV700 I think you still need an M500?

I'd reach out to one of the Kaleidescape ppl here or your dealer.
Click to expand...
Well, I currently have one M700 and one DV700 online and a second M700 in storage in case one of the active vaults fails. My current system links the Premiere system to the Terra system via CoStar and a M500 player. So I already have everything you mention.
 
andy said:
I also strongly agree with K Support’s recommendation. Accomplishing this would require putting a 14-year-old file system through three separate degraded rebuilds, with the risk of losing the entire file system if any one of those failed.
Click to expand...
Let's assume that the worst case scenario happens and the system does fail. How am I worse off than if I simply abandon the system other than the cost of the new drives? Theoretically, I could hedge that risk by buying the new drives one at a time rather than three at once.
 
rbienstock said:
Am I missing something?
Click to expand...

In addition to the hot spare, which you’re accounting for, you also need to account for the increased parity allocation. Parity capacity must equal the largest drive in the file system. It is currently 6TB, but once a 12TB drive becomes part of the file system, the parity allocation must increase to 12TB. That consumes the other 6TB, reducing the net gain from 21TB to 15TB.

Hope that makes sense,

Andy
 
You probably need to do RAID math. I have no knowledge on how k-scape configured these but if they used RAID of some sort for redundancy and fault tolerance, it’s not straight math.
 
andy said:
In addition to the hot spare, which you’re accounting for, you also need to account for the increased parity allocation. Parity capacity must equal the largest drive in the file system. It is currently 6TB, but once a 12TB drive becomes part of the file system, the parity allocation must increase to 12TB. That consumes the other 6TB, reducing the net gain from 21TB to 15TB.

Hope that makes sense,

Andy
Click to expand...
Someone worked in IT. 😉
 
rbienstock said:
Let's assume that the worst case scenario happens and the system does fail. How am I worse off than if I simply abandon the system other than the cost of the new drives? Theoretically, I could hedge that risk by buying the new drives one at a time rather than three at once.
Click to expand...

Agreed that you may not be worse off. It's just important to understand the risks, which it sounds like you do. I wish I could tell you the best path, but I've seen unhealthy file systems complete a rebuild that weren't expected to, and others that were perfectly healthy fail.
 
andy said:
Agreed that you may not be worse off. It's just important to understand the risks, which it sounds like you do. I wish I could tell you the best path, but I've seen unhealthy file systems complete a rebuild that weren't expected to, and others that were perfectly healthy fail.
Click to expand...
In K-scape or on servers?
 
rbienstock said:
I'm not sure that I understand your math. Right now, I have eight 3TB drives and six 6TB drives one of which is the hot spare. If I remove three of the 3TB drives, I'd lose 9TB of capacity. If I then add three 12TB drives, one of those drives would become the hot spare but the other two would come online and the 6TB drive that is currently the hot spare would come online for storage for a net increase of 21TB or so (24TB+6TB-9TB=21TB). Am I missing something?
Click to expand...
Removing 3x3TB drives removes 9TB of storage.
12TB drive #1 becomes the hotspare. The existing 6TB hotspare gets folded into the filesystem so you would gain 6TB of space (so you're still down 3TB).
12TB drive #2 becomes the parity drive (because the parity drive has to be large enough to rebuild the largest drive in your system. But it frees up the 6TB drive what was your parity drive to now be used for data. Now you are up 3TB of free space.
12TB drive #3 becomes a full data drive gaining you another 12TB. Total new space is 15 TB.

BTW, it goes without saying that if you're going to do that, do NOT under any circumstances attempt to replace all 3 drives at once. This will result in a double disk failure and will destroy your filesystem.

One disk at a time and wait for the rebuild to be complete before replacing the next one.
 
rbienstock said:
I've wondered about this. If I go into component settings on my Terra system and select "Add Component" I'm given the option to add both of my Disc Vaults that are currently connected to my Premiere system to the Terra system. Since I wasn't sure how that would affect my systems, I never tried that. But if I could just play the discs through the Terra without ripping, that would be a perfect solution.
Click to expand...
I checked with Kscape support and yes, you can connect a Vault to a Terra system, but it is only used for disc cataloging to get Digital Offers.
 
andy said:
In addition to the hot spare, which you’re accounting for, you also need to account for the increased parity allocation. Parity capacity must equal the largest drive in the file system. It is currently 6TB, but once a 12TB drive becomes part of the file system, the parity allocation must increase to 12TB. That consumes the other 6TB, reducing the net gain from 21TB to 15TB.

Hope that makes sense,

Andy
Click to expand...
Got it.
 
J.Green said:
BTW, it goes without saying that if you're going to do that, do NOT under any circumstances attempt to replace all 3 drives at once. This will result in a double disk failure and will destroy your filesystem.

One disk at a time and wait for the rebuild to be complete before replacing the next one.
Click to expand...
I would have done this anyway because I didn't know that you could do it any other way.
 
rbienstock said:
I checked with Kscape support and yes, you can connect a Vault to a Terra system, but it is only used for disc cataloging to get Digital Offers.
Click to expand...
If you have an Alto, then it can play the discs that are stored in the vault(s).

Older Stratos (Strato, Strato S, and Strato C) can play the DVDs in a vault but not the Blu-ray discs.
 
No. Alto can be grouped with the Encore system as its own separate player.

There is an option to do Co-star Player pairing between a Strato/Strato S/Strato C and an Alto if you want to use them to act like a single playback zone but this is not supported with Strato V, E, M, or K.
 
I have a similar setup to OP and was running short on space between my Strato S (12tb) and an older Prime 24tb server: I wanted more space to go with recently added Strato K.
My plan was to add 1 or 2 compact 30 servers but was warned it would slow the system, and I should go to the Prime 120.
I added one compact 30 to try. I noticed that after adding it, all the storage was still going to the legacy units: the new compact 30 was running, but nothing was being sent to it, and the system did slow down a bit with the added server.
I returned the compact 30 and ordered a Prime 120 tb server: now all the storage is going to the new server, and the entire system is faster. Aside from the price aspect, the Prime is the way to go…..
 
markrubin said:
[snip]
I added one compact 30 to try. I noticed that after adding it, all the storage was still going to the legacy units: the new compact 30 was running, but nothing was being sent to it,...
Click to expand...

Here's a little inside baseball on how download allocations work in a multi-server system. Downloads will _always_ go to the most performant server in the system until it is full. In the case where multiple servers are the same class, the download will go to the one with more space available.

So if you had a hypothetical system that had one of each type of server in it, the downloads would go to the servers in this order:

1. Terra Prime (SSD)
2. Compact/Mini Terra Prime (SSD)
3. Terra Prime (HDD)
4. Compact Terra Prime (HDD)
5. Terra
6. Compact Terra
7. Strato/Strato S
8. Alto

The downloads would continue to target the server highest on the list until that server is full before moving down to the next tier.

BTW, don't build a system that has one of each server type in it; performance will degrade noticeably.
 
^ good info
Does a Strato S with storage count as a server?
 
So ideally should I replace the Strato S with a Strato without storage for best performance?
I still need a Strato that will support a Co Star switch
 
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