Dell R720 Display problem with Fedora 26 server
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
@scottalanmiller i mean i want to experiment between perc and sw raid to learn the diff... so i guess i dont have that option to play around...
Ah, just for learning, that is fine. But RAID is RAID, it's not like you really learn much. You should learn MD in a lab, not on this hardware. You can't easily make an MD RAID array on top of the PERC using the image files to learn anything you want with MD.
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
@scottalanmiller i mean i want to experiment between perc and sw raid to learn the diff... so i guess i dont have that option to play around...
If you want to learn how to manage md, just make a virtual machine with a lot of small virtual drives. Much easier and safer if you're just wanting to learn (if you completely wipe something, it's only a vm.)
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@travisdh1 said in Dell R720 Display problem with Fedora 26 server:
@kuyaz said in Dell R720 Display problem with Fedora 26 server:
@scottalanmiller i mean i want to experiment between perc and sw raid to learn the diff... so i guess i dont have that option to play around...
If you want to learn how to manage md, just make a virtual machine with a lot of small virtual drives. Much easier and safer if you're just wanting to learn (if you completely wipe something, it's only a vm.)
Exactly
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@francesco-provino said in Dell R720 Display problem with Fedora 26 server:
One last thing: raid 1 on standard SATA hdd is gonna be slow. Quite slow.
AFAIK, RAID 1 will improve read 2x ? maybe slower write but not so much?
CMIIW.
Thanks.
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
@francesco-provino said in Dell R720 Display problem with Fedora 26 server:
One last thing: raid 1 on standard SATA hdd is gonna be slow. Quite slow.
AFAIK, RAID 1 will improve read 2x ? maybe slower write but not so much?
CMIIW.
Thanks.
Read is 2x, Write is 1x. There is no write penalty whatsoever.
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@scottalanmiller yes thats what i think of. so @Francesco-Provino statement is incorrect? : One last thing: raid 1 on standard SATA hdd is gonna be slow. Quite slow.
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
@scottalanmiller yes thats what i think of. so @Francesco-Provino statement is incorrect? : One last thing: raid 1 on standard SATA hdd is gonna be slow. Quite slow.
RAID 1 is 2x the speed of a single drive for reads, and 1x for writes. Period. No ifs, ands, or buts. You can define that as fast or slow, that's subjective. But the speed compared to a single drive is what it is, no exceptions.
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
@scottalanmiller yes thats what i think of. so @Francesco-Provino statement is incorrect? : One last thing: raid 1 on standard SATA hdd is gonna be slow. Quite slow.
@kuyaz a 7200rpm (I hope) drive is slow by today standard, even more for a virtualization lab. Today's standard is SSD.
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@francesco-provino said in Dell R720 Display problem with Fedora 26 server:
@kuyaz said in Dell R720 Display problem with Fedora 26 server:
@scottalanmiller yes thats what i think of. so @Francesco-Provino statement is incorrect? : One last thing: raid 1 on standard SATA hdd is gonna be slow. Quite slow.
@kuyaz a 7200rpm (I hope) drive is slow by today standard, even more for a virtualization lab. Today's standard is SSD.
And that's just for a laptop!
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iDRAC FTW!
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
@scottalanmiller yes thats what i think of. so @Francesco-Provino statement is incorrect? : One last thing: raid 1 on standard SATA hdd is gonna be slow. Quite slow.
It really comes down to what speed you are expecting.
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
tried this but fail : https://serverfault.com/questions/531269/linux-drivers-for-dell-poweredge-server
it seems dell is not really friendly to fedora
@scottalanmiller help
I looked at the results there. ServerFault doesn't seem to know servers very well, their top response was less than stellar. That wouldn't have flown around here.
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@tim_g said in Dell R720 Display problem with Fedora 26 server:
What do you need the display driver for?
What exactly are you installing that isn't Fedora 26 "Minimal" or "Fedora Server Edition"?
I know if you do install a GUI on a server, Cinnamon is a bad choice. Gnome or XFCE would work better.
This ^^^
Servers don't need display drivers. There is a good reason why Dell doesn't put any energy into this.
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@tim_g said in Dell R720 Display problem with Fedora 26 server:
Can you run virt-manager from a Linux desktop and connect to your 720 that way?
Even from just a VM on top of Windows or something. Doesn't need to be a dedicated Linux workstation.
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
I have problem with starting the Linux desktop. it seems the display is not set properly.
still figuring how to set the display properly in x11.Why are you using X11 on fedora 26? Wayland is the default.
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
@francesco-provino i assumae your idrac is enterprise license? mine is express only
sad... haha...
official price of the idrac enterprise license is 400$ ++ .... -.-This is a reason to use SuperMicro. That stuff is free.
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
thanks.Will continue my experiment. I guess I stuck with PERC RAID then.
Or blessed with, as is more commonly the case.
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@kuyaz said in Dell R720 Display problem with Fedora 26 server:
@francesco-provino do you know how to bypass the HW RAID in DELL R720?
I want to use SW raid instead with MD.Thanks.
Why do you want to bypass the PERC controller?
