Displaying 5 results from an estimated 5 matches for "12gbit".
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2017 Jan 20
6
CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?
...t ARC-1883I SAS controller with CentOS7?
I am planning to have RAID1 setup and I am wondering if I should use
the controller's RAID functionality which has 2GB cache or should I go
with JBOD + Linux software RAID?
The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034
7200rpm SAS/12Gbit 128 MB
If hardware RAID is preferred, the controller's cache could be updated
to 4GB and I wonder how much performance gain this would give me?
Thanks!
Peter
2017 Jan 20
0
CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?
> The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034
> 7200rpm SAS/12Gbit 128 MB
Sorry to hear that, my experience is the Seagate brand has the shortest MTBF
of any disk I have ever used...
> If hardware RAID is preferred, the controller's cache could be updated
> to 4GB and I wonder how much performance gain this would give me?
Lots, especially with slower...
2015 Aug 30
0
[OFFTOPIC] integrated LSI 3008 :: number of hdd support
...a 2-3x
over-subscription of lanes with HDD's. You will see it though if you
are really pushing allot of SSD's.
For example I have 32 1 and 2 TB SATA disks in 2 separate external
enclosures. The enclosures are daisy chained to a single 4 lane 3Gbit
port so I have a theoretical max of 12Gbit to use. What I do to test is
simply use dd to write zeros simultaneously to each one of the drives.
DD is able to write at the full speed of the drives until I get enough
of them going that the total throughput hits around 900MB/s. So there
is some overhead of the switching and whatnot but i...
2017 Jan 20
2
CentOS 7 and Areca ARC-1883I SAS controller: JBOD or not to JBOD?
On Fri, January 20, 2017 12:59 pm, Joseph L. Casale wrote:
>> The disks I am going to use are 6TB Seagate Enterprise ST6000NM0034
>> 7200rpm SAS/12Gbit 128 MB
>
> Sorry to hear that, my experience is the Seagate brand has the shortest
> MTBF
> of any disk I have ever used...
>
>> If hardware RAID is preferred, the controller's cache could be updated
>> to 4GB and I wonder how much performance gain this would give me?...
2015 Aug 30
2
[OFFTOPIC] integrated LSI 3008 :: number of hdd support
On 08/30/2015 12:02 PM, Mike Mohr wrote:
> In my experience the mass market HBAs and RAID cards typically do support
> only 8 or 16 drives. For the internal variety in a standard rack-mount
> server you'll usually see either 2 or 4 iPass cables (each of which support
> 4 drives) connected to the backplane. The marketing material you've
> referenced has a white lie in it: