[PVE-User] poor HDD performance
Patryk.Benderz at esp.pl
Fri May 24 10:13:06 CEST 2013
Dnia 2013-05-23, czw o godzinie 19:18 +0200, Vassilis V. pisze:
> A very wild guess...
> Are you sure that both servers have a BBU on their raid controllers and
> both controllers have write cache enabled?
BBU? Is this Backup Batterry Unit? If so, then no, both cards do not
have BBU. According to this  they are low-end cards, supporting only
RAID0 and RAID1. While this page is about SAS1068, and I have SAS1064E,
I assume my both cards do not have cache.
I will try to activate disk caches, as advised by Dietmar in this
thread . Any hints on how to activate HDD cache, maybe I can do it
Both cards look the same at lspci output:
proxmox218:~# lspci -nn -s 01:00.0
01:00.0 SCSI storage controller : LSI Logic / Symbios Logic SAS1064ET PCI-Express Fusion-MPT SAS [1000:0056] (rev 02)
root at pve:/# lspci -nn -s 05:00.0
05:00.0 SCSI storage controller : LSI Logic / Symbios Logic SAS1064ET PCI-Express Fusion-MPT SAS [1000:0056] (rev 02)
Patryk "LeadMan" Benderz
Linux Registered User #377521
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