Topic: SATA hard drive transfer speed issue revisited

[purvis]

from
http://wiki.contribs.org/KnownProblems

is noted:
SATA II drives are not fully supported
We suggest jumpering sata 300 drives to 150 until there is a newer kernel that supports them and/or the controllers better

my question
does this issue still exist with sme 7 or even sme 8
i have never jumpered a drive to slow it down and have had no problems
i have purchased some new drives and i do not have a listing of what drives are run on what servers and have not seen any issues.

well maybe one, and not sure even if it was an issue.
when on a raid 1 setup with a new sme 7.5.1 , it did seem a long time(i remember something like over 12 hours) to rebuild the second drive after the new install on a single hard drive system that also had all updates applied before the rebuild on a 1TB raid 1 setup.
but that aside, never no issues that i can detect, unless i am just not seeing any issues that exist.

but i would care for update on what is going on with the hard drive transfer speed issue that supposed to have existed.
i never really did see much discussion other than messages to use 150gbs
i want to run some virtual machines and would like to get the max speed out of the equipment i purchase.
thanks





 

[janet]

purvis

That is very old advice (mid 2007) from around the time sme7 first was released.
There have been many kernel upgrades since then.
SATA II is "currently" supported AFAIK

[Stefano]

purvis, if you need speed and redundancy you should create a custom SME install.. you need at least 6 dirves, 2 smaller (only for O.S.) ad 4 bigger

setup SME with raid 1 using the smaller drives..

then, following and adapting to SME this howto, setup a raid10 array using the remaining 4 hds..

mount the new volume where you prefer and use it for your virtual machines.

NOTE: NOT TESTED, should work... but it's not trivial

[purvis]

thanks you very much Mary for the reply.
I figured as much with what i saw on my servers, but this was a big question of what drives there SME server could use.

Stefano,
I have had super success with SME 8 and vmware.
I am going to run SME with some how or other with my VMs.
It was nice when i was able to use SME as my host, that made it where i did not have install SME as a VM.
I am now testing Proxmox VE as a few others are using it and suggesting it and it seems to support newer equipment if i am not mistake. I believe their kernel inside the Proxmox is very current.
Man, this stuff can burn you out just testing.
VMWARE ESXi is not for me in my testing, too much hassle for drivers, as i need self support and a good interface.
Thanks again and have a happy weekend, it is all rain here. (Be careful what you wish for.)

[purvis]

requesting on SATA speeds in SME 8

Are the SATA II 3gbps drives supported to transfer at that rate in SME8.


There are two sata drives in the Intel Icore-3 Lenovo
a cdrom and Seagate 2tb Barracuda
The Seagate drive was made in china.
i have not yet placed the 2nd hard drive in the system for raid 1 on this new system
with the command below

Code: [Select]

dmesg | grep -i sata


ata1: SATA max UDMA/133 cmd 0xf110 ctl 0xf100 bmdma 0xf0d0 irq 209
ata2: SATA max UDMA/133 cmd 0xf0f0 ctl 0xf0e0 bmdma 0xf0d8 irq 209
ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 0)
ata2: SATA link down (SStatus 0 SControl 0)
ata3: SATA max UDMA/133 cmd 0xf0b0 ctl 0xf0a0 bmdma 0xf070 irq 209
ata4: SATA max UDMA/133 cmd 0xf090 ctl 0xf080 bmdma 0xf078 irq 209
ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 330)
ata4: SATA link down (SStatus 0 SControl 330)


and just for what it is worth, with the command below

Code: [Select]

hdparm -tT /dev/sda

/dev/sda:
 Timing cached reads:   13552 MB in  2.00 seconds = 6781.75 MB/sec
 Timing buffered disk reads:  514 MB in  3.01 seconds = 170.79 MB/sec