Hi all,
I'm currently under discussion with a seller for buying 2 chassis made like this:
- Chassis : SC846E1-R900B
- PSU : 2x 900W PWS-920-1R
- BackPlane : BPN-SAS2-846EL1 (replace the original SAS1)
I would change the PSU with a SQ model, but it's not the purpose of this post.
I readed the BPN-SAS2-846EL1 documentation because i want to be sure that this backplane will not be the component responsible of any throughput limitation in the final build.
So, i'm not really familiar with backplane and expanders and i saw it has 3 primary connectors called PRI_J0, PRI_J1, PRI_J2 but i don't really found any documentation of how theses connectors works and can be used.
I would know if i can connect 3 HBA to the backplane ? Or connect a single HBA to the backplane using 2 or 3 connectors ?
I understand that i can't use failover because the EL1 don't have a second expander chip. But this not a mandatory feature and since i will probably use SATA drive (enterprise class), it's not an issue.
So, finally i don't found what is possible to do and what is not with HBA <---> BPN-SAS2-846EL1 .
I would have your welcome advices on which architecture i should do for have a 24x hard drives with the maximum throughput.
I have to say that i have plan to use a dual 10 Gb NIC using SFP+ connector. But if all goes well i will maybe able to use a single 40 Gb NIC using QSFP. (but it's largely unsure at this time).
- Which HBA i should use (only one or more than ones ) ?
- Which cables i should use (it seems to be the SFF-8087 from documentation i saw) ?
- How many cables ?
The SFF-8087 seems to be a 4x SAS channels at 6Gbs/s = 24 Gbs/s.
It would be sufficient for a dual 10Gb/s NIC but not for a single 40Gb/s NIC if i use only one cable.
I would also know if it has a real advantage to go with a SAS3 backplane (12 Gb/s) ?
With SATA drive at 7200 RPM, it doesn't seem to be an high plus-value, have missing something ?
With SSD it should be significantly different.
I do this post because i don't want make a mistake with this buy because it represent a significant cost i want to be sure where i go. Maybe i'm having wrong questions...
Thanks in advance for your helps.
Best Regards,
Sébastien.
PS: sorry for my poor english, i'm french.. (i know it's not an excuse :p)
I'm currently under discussion with a seller for buying 2 chassis made like this:
- Chassis : SC846E1-R900B
- PSU : 2x 900W PWS-920-1R
- BackPlane : BPN-SAS2-846EL1 (replace the original SAS1)
I would change the PSU with a SQ model, but it's not the purpose of this post.
I readed the BPN-SAS2-846EL1 documentation because i want to be sure that this backplane will not be the component responsible of any throughput limitation in the final build.
So, i'm not really familiar with backplane and expanders and i saw it has 3 primary connectors called PRI_J0, PRI_J1, PRI_J2 but i don't really found any documentation of how theses connectors works and can be used.
I would know if i can connect 3 HBA to the backplane ? Or connect a single HBA to the backplane using 2 or 3 connectors ?
I understand that i can't use failover because the EL1 don't have a second expander chip. But this not a mandatory feature and since i will probably use SATA drive (enterprise class), it's not an issue.
So, finally i don't found what is possible to do and what is not with HBA <---> BPN-SAS2-846EL1 .
I would have your welcome advices on which architecture i should do for have a 24x hard drives with the maximum throughput.
I have to say that i have plan to use a dual 10 Gb NIC using SFP+ connector. But if all goes well i will maybe able to use a single 40 Gb NIC using QSFP. (but it's largely unsure at this time).
- Which HBA i should use (only one or more than ones ) ?
- Which cables i should use (it seems to be the SFF-8087 from documentation i saw) ?
- How many cables ?
The SFF-8087 seems to be a 4x SAS channels at 6Gbs/s = 24 Gbs/s.
It would be sufficient for a dual 10Gb/s NIC but not for a single 40Gb/s NIC if i use only one cable.
I would also know if it has a real advantage to go with a SAS3 backplane (12 Gb/s) ?
With SATA drive at 7200 RPM, it doesn't seem to be an high plus-value, have missing something ?
With SSD it should be significantly different.
I do this post because i don't want make a mistake with this buy because it represent a significant cost i want to be sure where i go. Maybe i'm having wrong questions...
Thanks in advance for your helps.
Best Regards,
Sébastien.
PS: sorry for my poor english, i'm french.. (i know it's not an excuse :p)
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