EqualLogic

EqualLogic

Industry	Computer data storage
Founded	2001
Products	iSCSI arrays
Parent	Dell

EqualLogic products are iSCSI-based storage area network (SAN) systems marketed by Dell. Dell has 3 different lines of SAN products: EqualLogic, Compellent and Dell PowerVault. Before the acquisition by Dell, in January, 2008, EqualLogic was an independent company.

History

EqualLogic is a company based in Nashua, New Hampshire. Formed in 2001 by Peter Hayden, Paul Koning, and Paula Long, it raised $52 million from investors between 2001 and 2004. The company was considering an initial public offering on the Nasdaq stock-exchange, but accepted an offer from Dell in 2008. The all-cash take-over transaction of $1.4 billion was the highest price paid for a company financed by venture investors at the time. At the time of acquisition, the company was backed by three venture capital investors: TD Capital Ventures, Focus Ventures and Sigma.

Architecture

EqualLogic systems use iSCSI via either Gigabit Ethernet or 10 Gigabit Ethernet controllers. The currently (June 2014) sold systems with 1 Gbit/s connections are the PS4100, PS6100 and PS6200 while the comparable systems with 10 Gbit/s Ethernet connections are PS4110, PS6110 and PS6210. There have been a number of previous generations, and as long as the software is updated on older systems they can work with the newer models. Within each series there are several options allowing for different types and sizes of hard disk drives or solid-state drives. EqualLogic options combine both in the same chassis and automatically migrate the most frequently accessed data to the SSDs. All PS series systems, except the PS-M4110 blade chassis system, are 19-inch rack systems in a 2 rack unit form factor or a 4 RU chassis for some of the PS61x0 models and the PS65x0 dense models.

EqualLogic Arrays can be combined with up to 16 arrays per group. Groups can mix different members, including multiple hardware generations, as well as different RAID types, in a group. By combining multiple arrays per group, very large storage groups can be created with maximum capacity in one group of over 1.5 PB. Arrays can be segmented into pools, and from pools, volumes. Volumes are exposed on a SAN network, and used by virtual machine hosts or other computers.

Controllers

Each array comes with two controllers, offering redundancy and load-balancing. A controller offers one or more data Ethernet interfaces for the iSCSI traffic and one management interface. A typical array has 2 or more iSCSI Ethernet interfaces and one management interface. The arrays with model PS XX00 have Gigabit Ethernet ports while the PS XX10 offer 10 Gigabit Ethernet ports for iSCSI traffic and a 10 Mbit/s / 100 Mbit/s management port. Depending on the model the interfaces can be either copper-based Gigabit Ethernet or 10GBaseT or fiber-optic interfaces using small form-factor pluggable transceivers. Controllers can be readily identified by a combination of their "faceplate" profile and color.

Controller Type	Profile	Color	Management	Data
Type 1 SATA	wide	black	1	3 x 1Gbase-T/1Gbit/s SFP (combo)
Type 2 SATA	wide	blue	1	3 x 1Gbase-T/1Gbit/s SFP (combo)
Type 4 SAS	narrow	grey	0	3 x 1 Gbit/s
Type 5 SATA	narrow	light yellow	0	3 x 1 Gbit/s
Type 7	narrow	light green	0	4 x 1 Gbit/s
Type 8	narrow	magenta	10/100 Mbit/s	2 x 1 Gbit/s
Type 10	narrow	orange	1	2 x SFP+
Type 11	Wide	light green	1	4 x 1 Gbit/s
Type 12	Wide	magenta	1	2 x 10Gbase-T
Type 14	Wide	orange	1	1x10Gbase-T/1xSFP+
Type 17	Wide	yellow	1	1x10Gbase-T/1xSFP+

Models

The current primary models are the PS4200, PS6200 and PS6500 with 1Gb Ethernet and 10 Gb Ethernet model options. Within each "series" (i.e. 4200, 6200 and 6500) there are several sub models that include specific disk configurations. The last generation systems are the PS4100 and PS6100 series systems which continue to be sold.

PS41x0

The PS4100 series consists of 4 rack-models and one PS-M4110 for placement in the Dell M1000e blade enclosure. This model is described separately below.

PS4000 rack models
Model	PS4100E	PS4100KV3,5	PS4110E	PS4110KV3,5
height (RU)	2 RU	2 RU	2 RU	2 RU
#HDD	12	12	12	12
HDD type	7200 NL-SAS	15K SAS	7200 NL-SAS	15K SAS
capacity min using	12 TB 12 x 1 TB	3.6 TB 6 x 600 GB	5 TB 12 x 500 GB	3.6 TB 6 x 600 GB
capacity max using	36 TB 12 x 3 TB	7.2 TB 12 x 600 GB	36 TB 12 x 3 TB	7.2 TB 12 x 600 GB
#controllers	2	2	2	2
memory/ctrl (Gb)	4	4	4	4
iSCSI ports per ctrl.	2 GbE	2 GbE	1 x 10GBaseT 1 x 10 Gb SFP+	1 x 10GBaseT 1 x 10 Gb SFP+
mgt ports per ctrl.	1 x 10/100Mb	1 x 10/100Mb	1 x 100 Mb	1 x 100 Mb
Max # volumes	256	256	256	256
Snapshots/volume	128	128	128	128
Snapshots/group	2048	2048	2048	2048
RAID levels	5,6,10,50	5,6,10,50	5,6,10,50	5,6,10,50
Max arrays/group	up to 2 x PS4xxx arrays/group

PS61x0

The PS61x0 series consists of two main models: PS6100 and PS6110 for 1G or 10G iSCSI ethernet ports on the controller. All arrays support RAID levels 6,10 and 50.

For the PS6100 series and PS6110 series there are 6 sube-models, based on the type of disks used:

Model	PS61x0-E	PS61x0-X	PS61x0-XV	PS61x0-S	PS61x0-XS	PS61x0-XV3,5
usage/type	high-capacity	balanced	high-performance	low latency	automated SSD tiering	high performance& high capacity
height (RU)	4	2	2	2	2	4
weight	45,36	25,4	25,4	24,5	24,5	44,45
max # disks/size	24x 3,5"	24x 2.5"	24 x 2,5"	24 x 2,5"	7 x 2,5SSD 17 z 10K SAS	24 x 3,5"
disk type	7200 NL-SAS	10K SAS	15K SAS	SSD	SSD/10K SAS	15K SAS
min capacity using	12 TB 500 GB HDD	7,2 TB 300 GB	3,5 TB 146 GB	9,6 TB 400 GB SSD	13 TB 7 x 400 GB SSD 17 x 600 GB HDD	7,2 TB 12 x 600GB
max capacity using	72 TB 3 TB HDD	21,6 TB 900 GB	7,2 TB 300 GB	19,2 TB 800 GB SSD	13 TB fixed capacity	14,4 TB 600 GB
Powerconsumption	1080 W	700 W	700 W	700 W	700 W	1080 W

PS-M 4110

The PS-M 4110 is a SAN array in the form-factor of a dual 1/2 height blade-server and can be installed in the Dell M1000e blade-chassis. There are 4 models of this "datacenter in a box" solution where servers, storage and networking are all combined in one blade-enclosure

The SAN communicates with the blade servers in the chassis and/or external servers via Force10 MXL switches, PowerConnect M8024-K or Brocade based PC-M8428-K in the back of the enclosure. Also possible to use 10G Passthrough modules and external switches.

PS-M 4110 blade SAN
Model	PS-M4110-E	PS-M4110-X	PS-M4110-XV	PS-M4110-XS
Usage	Hi-capacity	balanced perf/capacity	high perf	low latency
Controllers	1 or 2	1 or 2	1 or 2	2 only
Typical power	248,9 W	261 W	293,3 W	230,4 W
Weight (Kg)	12,49	12,87	12,62	12,38
Disk drives	14 HDD	14 HDD	14 HDD	9 x 10K SAS & 5 x SSD
Drive capacity	500 GB or 1 TB	600 GB 900 GB	146 GB 300 GB	600 GB HDD 400 GB SSD
Drive type	7,2k NL-SAS	10K SAS	15K SAS	10K SAS+SSD
System capacity	7 - 14 TB	8,4-12,5 Tb	2,5-4,2 TB	7,4 Tb

PS6500 and PS6510

The PS65x0 series consists of in total 6 models scalable SAN solutions. As with the other series the PS6500 is using 1Gb ethernet NIC's and the PS6510 offers 10Gb SFP+ interfaces.

PS 65x0 SAN
Model	PS6500-E/P6510-E	PS6500-ES/PS6510-ES	PS6500-X/PS6510-X
Usage	Hugely scalable High density	Increased capacity+performance	High performance &Dense Capacity
Height (RU en cm	4 = 17,5 cm	4 = 17,5 cm	4 = 17,5 cm
Weight (Kg)	74,8	74,8	74,8
Powerconsumption	1000-1030 VA 1400 VA Peak	1000-1030 VA 1400 VA Peak	1000-1030 VA 1400 VA Peak
Heat dispensation	3400 BTU max	3400 BTU	3400 BTY
# disks	48	7 SSD + 41 HDD	48
drive-options	1TB SATA 2TB SATA 3 TB NL-SAS	7 x 400 Gb SSD & 41 x 2 TB NL-SAS	600 GB-SAS 900 GB SAS
driver speed	7200 RPM SATA 7200 RPM SAS	SSD & 7200 RPM SAS	10K RPM SAS
array capacity	48 TB 96 TB 144 TB	84.8 TB	28,9 TB 43,2 T

FS7500 / FS7600

Dell Fluid File System is available in combination with an EQLX array for the storage. FluidFS is also delivered in combination with Compellent and PowerVault SAN systems. Both the FS7500 and FS7600 NAS using EQLX SAN offers a maximum system site of 509 TB. The FS7600 is the 2nd generation system which is also available using 10G iSCSI speeds between the FS controller and the storage backbone