Does anyone know if a PERC H200 is a real RAID controller? I'm about to build a box to CentOS 6.5 (it was Windows...) with RAID 6 on Monday, and this PE R610 has this.... I'm familiar with PERC 6 and 7s, but just dunno 'bout this one.
mark
On 21/03/14 05:52 PM, m.roth@5-cent.us wrote:
Does anyone know if a PERC H200 is a real RAID controller? I'm about to build a box to CentOS 6.5 (it was Windows...) with RAID 6 on Monday, and this PE R610 has this.... I'm familiar with PERC 6 and 7s, but just dunno 'bout this one.
mark
It says it's a hardware RAID controller, but it only supports RAID levels 0, 1 and 10. That tells me it has no real ASIC and so far as I can see with google, it doesn't support caching or a BBU. So while it might be "hardware", I doubt it's "real" in the sense that it can do parity calcs, read/write reordering and write-back caching.
Digimer wrote:
On 21/03/14 05:52 PM, m.roth@5-cent.us wrote:
Does anyone know if a PERC H200 is a real RAID controller? I'm about to build a box to CentOS 6.5 (it was Windows...) with RAID 6 on Monday, and this PE R610 has this.... I'm familiar with PERC 6 and 7s, but just dunno 'bout this one.
It says it's a hardware RAID controller, but it only supports RAID levels 0, 1 and 10. That tells me it has no real ASIC and so far as I can see with google, it doesn't support caching or a BBU. So while it might be "hardware", I doubt it's "real" in the sense that it can do parity calcs, read/write reordering and write-back caching.
Thanks! That's what I needed to know, esp. since they want RAID 6. Sounds like software RAID to me, he said, cheerfully.
mark
On 3/21/2014 2:52 PM, m.roth@5-cent.us wrote:
Does anyone know if a PERC H200 is a real RAID controller? I'm about to build a box to CentOS 6.5 (it was Windows...) with RAID 6 on Monday, and this PE R610 has this.... I'm familiar with PERC 6 and 7s, but just dunno 'bout this one.
if it doesn't have a flash-backed or battery-backed write-back cache, then it hardly matters what it is.
the specs on that H200 sound like an LSI 2008 SAS2 HBA chip that has hardware mirroring, but without writeback cache.
I'd configure it for JBOD and do my raid in the OS.
If you want I will happily trade it for a perc 6 from a R610, the h200 is much better suited for zfs.
Michael On Mar 21, 2014 11:22 PM, "John R Pierce" pierce@hogranch.com wrote:
On 3/21/2014 2:52 PM, m.roth@5-cent.us wrote:
Does anyone know if a PERC H200 is a real RAID controller? I'm about to build a box to CentOS 6.5 (it was Windows...) with RAID 6 on Monday, and this PE R610 has this.... I'm familiar with PERC 6 and 7s, but just dunno 'bout this one.
if it doesn't have a flash-backed or battery-backed write-back cache, then it hardly matters what it is.
the specs on that H200 sound like an LSI 2008 SAS2 HBA chip that has hardware mirroring, but without writeback cache.
I'd configure it for JBOD and do my raid in the OS.
-- john r pierce 37N 122W somewhere on the middle of the left coast
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Yes, its real raid controller, but ##### slow and crappy card, please avoid it, if possible. 21.3.2014 23.53 kirjoitti m.roth@5-cent.us:
Does anyone know if a PERC H200 is a real RAID controller? I'm about to build a box to CentOS 6.5 (it was Windows...) with RAID 6 on Monday, and this PE R610 has this.... I'm familiar with PERC 6 and 7s, but just dunno 'bout this one.
mark
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
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