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Re: drive controller Q?



On 9/14/22 16:03, Dan Ritter wrote:
gene heskett wrote:
On 9/14/22 14:55, Dan Ritter wrote:
gene heskett wrote:
Greetings all;

Does anyone have experience with this controller card?

https://www.newegg.com/p/14G-04YB-00003?Item=9SIB2XHHUE3880

Specifically, whats my chances of moving an existing software raid10's 4
Samsung 1T's to it,
and then attaching 4 more 2T drives to it too, to create a separate 4T
raid-10 for amanda?

Without any data loss if possible?
I don't have any experience with this one. I don't know what
SATA chipset it is using, but there aren't many that the kernel
doesn't already support.

That said, it is a straight SATA3 board, not a RAID board, so
there will be no difficulty in moving mdadm, btrfs or zfs RAIDs
over to it.

I would point out that you can't actually fit 16 x 3Gb/s worth
of bandwidth over one PCIe lane; if this is v1 PCIe, you have a
total of 250MB/s available. That's probably fine for four
spinning disks doing backup duty.

Here's a 4-port model with named PCIe v2 support and a
recognizable SATA chipset, for slightly less money:

https://www.newegg.com/syba-si-pex40064-sata-iii/p/N82E16816124064?Item=N82E16816124064

-dsr-
.
I looked at that one too, Dan, but I've filled up the back panel with usb
breakouts and it will
take a major re-arrangement to clear a pic-e slot. This mobo only has two,
and another drive
controller like this 4 port is already in the other slot.  Not saying it
can't be done, but
will be a pita to do. There is also a 6 port onboard controller that I might
be able to use
for the 2nd raid. With a boot drive, and a buffer drive for amanda, and 4
2T's on it that would
fill it up. I've got a usb3 optical drive that burns a dvd now and then so I
can do away with the
sata drive if push comes to shove. Or the accessory card for the /home
raid-10 is a 6 port with
2 empty sockets.

Can I make a 2nd raid 10 from two separate controllers? 2 drives on the mobo
controller and 2 on the
plugin controller? I'd think that could lead to mix-n-match problems given
udevs penchant for
shuffling drives.

Too many options......
The glory of software RAID over SATA3 is that they don't have to
be on the same controller at all. All the clever systems put
identifiers on each of the participating drives and you can
assemble the RAID without necessarily knowing where all the
parts are -- they will be found.
Great. Good news. So all I really need are the drives.
(This is definitely the case for mdadm and ZFS, probably less so
for btrfs, and possibly not at all true for LVM.)
I knew there was a reason I've never used LVM. But I didn't know it till now.  Seems like I can faintly recall a fedora install going south in a day or so, waaaay back then before I decided I wasn't cut out to be a red hat lab rat. Wasn't healthy at all.

Thanks Dan
-dsr-

.


Cheers, Gene Heskett.
--
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/>


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