MikePort Posted February 20, 2014 Share Posted February 20, 2014 (edited) Hello everyone, I have a HP Microserver Gen8:- G2020T processor- 10GB RAM- 1 x SSD Kingston 60GB SATA-III 2.5 inch V300 in the ODD bay for OS (CentOS Server)- 4 x Wd Blue 1TB in the four drive bays for media( software Raid 10 with mdadm - Linux Software RAID )- AHCI mode in Bios Usage:- media Server (serviio)- file sharing (samba)- video monitoring and recording for 2 IP cameras (motion)- monitoring (nagios)- backup server (backuppc) I'm not sure if the SSD/HDD performance is good and I couldn't find linux benchmarks in the forums to compare the results. Bellow are my results (using hdparm and dd): 1. SSD (SATA2) [root@HP ~]# hdparm -tT /dev/sde /dev/sde: Timing cached reads: 11922 MB in 2.00 seconds = 5964.42 MB/sec Timing buffered disk reads: 604 MB in 3.00 seconds = 201.05 MB/sec [root@HP ~]# dd if=/dev/zero of=/root/tempfile bs=2M count=10000 conv=fdatasync,notrunc 10000+0 records in 10000+0 records out 20971520000 bytes (21 GB) copied, 85.1146 s, 246 MB/s 2. HDD (software SATA 10) [root@HP ~]# hdparm -tT /dev/md1 /dev/md1: Timing cached reads: 11682 MB in 2.00 seconds = 5844.44 MB/sec Timing buffered disk reads: 1102 MB in 3.01 seconds = 366.72 MB/sec [root@HP ~]# dd if=/dev/zero of=/mnt/Public/tempfile bs=2M count=10000 conv=fdatasync,notrunc 10000+0 records in 10000+0 records out 20971520000 bytes (21 GB) copied, 73.2416 s, 286 MB/s Is there a setting that I'm missing or SSD speed should be closer to 3.0 Gbps ? Also I want to setup another software array - RAID1 this time, using the first 2 drive bays (SATA-3). I want to check if disk speed is closer to 6.0 Gbps. Regards, Mike Edited February 20, 2014 by MikePort Link to comment Share on other sites More sharing options...
schoondoggy Posted February 20, 2014 Share Posted February 20, 2014 For your SSD, 246MB/s is about the highest speed you will see on a SATA II port. The sustained transfer rate of a WD Blue drive is 150MB/s. If you RAID 1 a pair of them on the SATA III ports, you will get around 150MB/s. Your RAID 10 speed of 286MB/s is seems accurate. RAID 0 would make your drive set faster, but there is no resiliency in RAID 0. Depending on how much you are going to do at the same time, I think your performance stats above are good enough for media and file serving. 1 Link to comment Share on other sites More sharing options...
MikePort Posted February 21, 2014 Author Share Posted February 21, 2014 Many thanks schoondoggy . Yes, current performance is more than enough. Regards, Mike Link to comment Share on other sites More sharing options...
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