14. IBM System Storage DS3400 Summary_ 4 GbpsFibre Channel (FC) interface technology_ Direct-attach storage (DAS) or SAN solution —start with a DAS configuration and seamlessly transition to a FC SAN when ready _ Combination of 12 SAS or SATA 3.5" drives per enclosure _ DS3000 products are geared towards Small and Medium Business (SMB) and departmental environments, SAS and iSCSI attachment technologies are supported as well._ Expandable by attaching up to three EXP3000s for a total of 21.6 TB of storage capacity with 450 GB SAS or up to 48.0 TB with 1.0 TB SATA _2 U rack mount enclosure with 12 easily accessible drive bays _ Management software IBM System Storage DS3000 Storage Manager _ Supported drives Supports 3Gbps SAS 73 GB, 146 GB, 300 GB, and 450 GB SAS drives at 15,000 rpm speeds and SATA disks at 7,200 rpm speed _ Cache per controller512 MB battery-backed cache with 1 GB upgrade option
15. EMC CX3-40s System Storage Summary _CX3 series is midrange storage array market in performance and scalability. _The CX3-40 and CX3-40c offer an excellent combination of performance and scalability and are well suited for OLTP and messaging workloads. _ Storage Processor Enclosures (SPE) offer four Xeon® processors, 8GB memory, and four 4Gb Fibre Channel host connections. The CX3-40c also includes eight iSCSI ports for connection to hosts via Ethernet. _ Both models support directly connected hosts or up to 128 HA (dual-connected) SAN connected hosts. And, each array supports up to 240 disk drives for a maximum raw capacity of up to 119TB
51. Common Types Connection_ Level 0: Striped Disk Array without Fault Tolerance. Also known as JBOD _ Level 1: Mirroring and Duplexing. Most commonly used for DB and applications. _ Level 3: Bit-Interleaved Parity. Used mostly for “streaming” data like audio and video _ Level 5: Block Interleaved Distributed Parity. Most used RAID level for balanced performance and cost. _ Level 6: Independent Data Disks with Double Parity. Provides block-level striping with parity data distributed across all disks. _ Level 0-1 : Mirror of Stripes _ Level 1-0: A Stripe of Mirrors FC: 146GB – 10K Rpm Price: $1600 146GB – 15K Rpm Price: $1955 SATA II: 500GB – 7200Rpm Price: $2065 FC SAN iSCSI SAN (IP SAN) Performance of iSCSI SAN = ½ performance FC SAN (depend on connection speed as much)