What is considered 'cheap hw raid' vs 'good hw raid'
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@BRRABill said in What is considered 'cheap hw raid' vs 'good hw raid':
@scottalanmiller said
Good hardware RAID:
- Good, enterprise vendor like LSI or Adaptec
- Cache of at least 512MB
- Support for a wide variety of RAID levels
- Fast CPU or ASIC
- Can be swapped out in case of failure
Under those guidelines, why wouldn't the PERC H310 qualify?
It does, it is a LSI card IIRC.
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@BRRABill said in What is considered 'cheap hw raid' vs 'good hw raid':
@scottalanmiller said
Good hardware RAID:
- Good, enterprise vendor like LSI or Adaptec
- Cache of at least 512MB
- Support for a wide variety of RAID levels
- Fast CPU or ASIC
- Can be swapped out in case of failure
Under those guidelines, why wouldn't the PERC H310 qualify?
No. It meets qualification #1 but has no cache and an anaemic CPU that can barely keep up.
https://mangolassi.it/topic/6375/examining-the-dell-perc-h310-controller
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@coliver said in What is considered 'cheap hw raid' vs 'good hw raid':
@BRRABill said in What is considered 'cheap hw raid' vs 'good hw raid':
@scottalanmiller said
Good hardware RAID:
- Good, enterprise vendor like LSI or Adaptec
- Cache of at least 512MB
- Support for a wide variety of RAID levels
- Fast CPU or ASIC
- Can be swapped out in case of failure
Under those guidelines, why wouldn't the PERC H310 qualify?
It does, it is a LSI card IIRC.
It is LSI, it's not a serious hardware RAID card. It's only useful for learning, not production.
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@scottalanmiller said in What is considered 'cheap hw raid' vs 'good hw raid':
@BRRABill said in What is considered 'cheap hw raid' vs 'good hw raid':
@scottalanmiller said
Good hardware RAID:
- Good, enterprise vendor like LSI or Adaptec
- Cache of at least 512MB
- Support for a wide variety of RAID levels
- Fast CPU or ASIC
- Can be swapped out in case of failure
Under those guidelines, why wouldn't the PERC H310 qualify?
No. It meets qualification #1 but has no cache and an anaemic CPU that can barely keep up.
https://mangolassi.it/topic/6375/examining-the-dell-perc-h310-controller
Oh that's interesting I always thought it was a full on RAID card. Looks like it is just a SAS expander from that thread.
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@coliver said in What is considered 'cheap hw raid' vs 'good hw raid':
@scottalanmiller said in What is considered 'cheap hw raid' vs 'good hw raid':
@BRRABill said in What is considered 'cheap hw raid' vs 'good hw raid':
@scottalanmiller said
Good hardware RAID:
- Good, enterprise vendor like LSI or Adaptec
- Cache of at least 512MB
- Support for a wide variety of RAID levels
- Fast CPU or ASIC
- Can be swapped out in case of failure
Under those guidelines, why wouldn't the PERC H310 qualify?
No. It meets qualification #1 but has no cache and an anaemic CPU that can barely keep up.
https://mangolassi.it/topic/6375/examining-the-dell-perc-h310-controller
Oh that's interesting I always thought it was a full on RAID card. Looks like it is just a SAS expander from that thread.
It's basically a high end SAS card with some really basic RAID functions tacked on.
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The card i have is LSI Sas 9260-4i
http://www.avagotech.com/products/server-storage/raid-controllers/megaraid-sas-9260-4i#specificationsSeems to check Scott's checkboxes. Although it is getting a bit old spec wise it seems, it has not been used to my knowledge.
This supermicro board would be something i might want for home use.
https://www.supermicro.com/products/motherboard/Xeon/C600/X10SRL-F.cfm
I dont really know enough about the Intel C612 chipset it has to know if it is good or not. -
@momurda said in What is considered 'cheap hw raid' vs 'good hw raid':
The card i have is LSI Sas 9260-4i
http://www.avagotech.com/products/server-storage/raid-controllers/megaraid-sas-9260-4i#specificationsSeems to check Scott's checkboxes. Although it is getting a bit old spec wise it seems, it has not been used to my knowledge.
Yup, very entry level.
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@momurda said in What is considered 'cheap hw raid' vs 'good hw raid':
The card i have is LSI Sas 9260-4i
http://www.avagotech.com/products/server-storage/raid-controllers/megaraid-sas-9260-4i#specificationsSeems to check Scott's checkboxes. Although it is getting a bit old spec wise it seems, it has not been used to my knowledge.
This supermicro board would be something i might want for home use.
https://www.supermicro.com/products/motherboard/Xeon/C600/X10SRL-F.cfm
I dont really know enough about the Intel C612 chipset it has to know if it is good or not.I've used that card before. It was bought for a white-box server build a very long time ago. Worked really well for what we were doing.
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@momurda what did you end up using? And how did it end up performing?
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From my experience, you are correct about the fake raid terminology.
Fake RAID = is the raid you do on the chip-set level without any dedicated card doing the works, but it fools the operating system that gets installed on-top of it, and does not require any special config from the OS side. I think you can do fake raid for RAID 1 for important workstations like the HR computers for example.
Software raid = is like mdadm in Linux or Windows 10 storage spaces, it relies on the OS side for everything.
Read RAID or Hardware RAID is getting a good RAID card.
