Perseus System Configuration

Theoretical peak speed: (64 cores) * (2.67 Gcycles/s/core) * (4 DP flop/cycle) = 680 Gflop/s, double precision
   Assumes a pipeline with 1 SSE addition (2 DP additions) and 1 SSE multiplication (2 DP multiplications) every cycle
Sept. 2011:     Purchased from Red Barn Computers
Oct. 2011:     Fedora 15 installed on the 500GB HDD
     *At some point an Intel Xeon Phi (MIC card) was installed, but the required BIOS update failed, so the original state was restored
Sept. 2014:     CentOS 7 installed on an added (old) 500GB HDD; 2 (newer) 1TB HDDs added
Nov. 2014:     2 more newly purchased 1TB HDDs added and 2 RAID-0 pairs created, temporarily
     *Eventually RAID-0 pairs were dismantled due to CentOS boot problems, and the 4 1TB HDDs were reformatted as separate devices
Mar. 2015:     CentOS 7 became the default OS
Mar. 2016:     CentOS 7.2 became the default OS
Apr. 2017:     CentOS 7.3 became the default OS
Oct. 2017:     Went offline due to multiple boot-time issues
Hardware Configuration
Server Type:     Supermicro SuperServer 5086B-TRF - 5U rack-mountable - serial no. C75800A 25A00040
Processors:     64 cores, 8x Eight-Core Intel Xeon "Westmere-EX" Processors*, E7-8837, 24MB Cache, 2.67GHz
     *No real upgrade path; these are probably the best processors for this platform's LGA1567 or "Socket LS"
Memory:     256GB, 32x 8GB ECC Registered DDR3 SDRAM DIMMs*, 1066MHz
     *Potentially expandable to 2TB (64x32GB); 1066MHz is the highest speed possible on this platform
Bootable Hard Drives:     500GB, SATA Port 0, Seagate Momentus ST9500420AS, 7200RPM SATA2 3.0Gbps 2.5"
  500GB SATA Port 1, Samsung Spinpoint M8 ST500LM012 (HN-M500MBB), 5400RPM SATA2 3.0Gbps 2.5"
Additional Hard Drives:     4TB, SATA Ports 2, 3, 4 and 5, 4x HGST Travelstar HTS721010 (each 1TB), 7200RPM SATA3 6.0Gbps 2.5"
I/O Controller Hub:     Intel 82801JI (ICH10R "Southbridge" family), 4-port and 2-port SATA IDE controllers
  4 ports (slots 0-3) support "fake RAID" in 0, 1, and 10 configurations (no RAID 5 in Linux), 3.0 Gbps
Network Interface Controller:     Dual Intel Corporation 82576 Gigabit Network Connections
Motherboard and BIOS:     Supermicro X8OBN-F Platform; American Megatrends for X8OBN 0.13 x64, 03/29/2011

Disk Structure

PropertyDrive Maker and Size
Seagate 500GB Samsung 500GB HGST 1TB HGST 1TB HGST 1TB HGST 1TB
Partition Names /dev/sda1 /dev/sdc1 /dev/sdc2 /dev/sdc3 /dev/sdb1 /dev/sdd1 /dev/sde1 /dev/sdf1
Mount Points in Fedora /  (root) /centosboot /centoshome /centos /user0 /user1 /user2 /user3
Mount Points in CentOS /fedora /boot /home /  (root)


Dual-Boot Instructions
Possible Choices:     CentOS 7.3 by default, with the option to boot into the previous OS, Fedora 15 "Lovelock".
From GRUB Menu:     After the setup phase, when the GRUB menu appears, use the up/down arrows to select the desired OS, then hit <CR>.
     This selection is not remembered on the next boot. To make the change permanent, you have to alter the grub.cfg file.
From BIOS Boot Menu:     Scroll past the end of the page and select the option "Hard Drive BBS Priorities" that appears. (Scrolling up works too.)
     The pop-up will show all available "legacy" drives, not just one. Scroll to the desired drive and move it to the top with "+".
     (This is NOT documented in the manual, pp. 5-29 to 5-31!!) Use Esc and arrows to reach Save Configuration and Exit.
Hardware Interrogation Commands
Processors:     more /proc/cpuinfo
Memory:     more /proc/meminfo; top; sudo dmidecode --type memory   #grep for Size or Speed
Bootable Hard Drives:     sudo fdisk -l | grep dev   #bootable partitions are marked *
Additional Hard Drives:     blkid; gparted (Device Information panel in GParted GUI)
RAID-0 Hard Drives:     lspci | grep -i raid; dmraid -r; cat /proc/mdstat   #the last one detects software RAID
I/O Controller Hub:     lspci | grep SATA; sudo dmidecode --type 8 | grep SATA
Network Interface Controller:     lspci | grep -i ether

Software Configuration Highlights

The links below lead to separate pages that give precise, step-by-step descriptions of what was done in each year.

Sept.-Nov. 2014: First attempts were made at installing CentOS 7 and expanding disk storage

Mar. 2015: CentOS 7 became the default OS, and users were given remote desktop access for data visualization

Mar. 2016: CentOS 7.2 became the default OS, but the update ran into serious trouble

Apr. 2017: CentOS 7.3 became the default OS, in a further bid to gain stability

Quieting the Fan

Here's what people should do if the fans kick into high speed and won't settle down to a reasonable rate.

Last updated on 9/10/18 by Steve Lantz (steve.lantz ~at~