Term
| List 6 benefits of implementing NAS |
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Definition
1. storage consolidation
2. access files quickly and directly
3. Reduces complexity
4. security
5. Increases flexibilty
6. Cost
* downlside is speed, due to file level access |
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Term
| What I/O levels does a NAS device use? |
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Definition
| File level I/O from host to NAS device, and block I/O from NAS device to storage |
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Term
| Name the 2 file systems mounted remotely on a NAS device |
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Definition
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Term
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Definition
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Term
| Would you consider a NAS solution for a randomly accessed database? Why or Why not? |
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Definition
| No. It should be sequentially accessed db, non indexed or have a flat file structure. |
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Term
| List the 4 steps to setting up a NAS Volumne and File system |
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Definition
1. Create the Array Volume (create LUNs)
2. Create NAS Volume (discovery process)
3. Create Network file systen(NFS or CIFS)
4. Mount/Share the File System |
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Term
| What the Unix & Windows commands to Pubilsh the file system |
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Definition
Export - Unix
Share - Windows |
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Term
| After publishing the file system how can a Client get access? |
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Definition
| Mount a drive in Unix or MAP a drive in Windows |
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Term
| What is the UNIX command to change a file permission? |
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Definition
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Term
| Can the NAS device authenticate a user both locally and over the network? |
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Definition
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Term
| What's the main difference between a NSx00GS and a NSx00G? |
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Definition
| NSx00GS has 1 datemover and the NSx00G has 2. |
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Term
| Identify the 4 components of the NSxxx Frame? |
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Definition
| a. Disk Array
b. control station
c. storage processers
d. Data Movers[image] |
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Term
| What is the name of the file and its location that enables the Data Mover to failover correctly? |
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Definition
| The configuration database stored on the Control Station |
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Term
| What happens to the Data Mover if the Control Station is unavailable during a failover? |
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Definition
| The data mover will NOT failover as designed without access to the configuration DB |
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Term
| In a Automatic configuration, describe the 3 failover procedures of the Control Station |
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Definition
1. Remove power from the failed Data Mover
2. Set the location for the Standby DM to assume its new role in the Config. DB
3. Control the personality take over and allow the standby DM to assume the primary role |
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Term
| List the 3 operational modes for FAILOVER for a Data Mover |
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Definition
1. automatic - detect/re-role/assume
2. retry - detect/reboot DM/ then failover
3. manual - detect/ remove power/ wait |
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Term
| What does DART stand for and what type of OS is installed on it? |
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Definition
Data Access in Real Time
Linux 7.2 |
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Term
| What DART mechanism minimizes data access distruption and describe the actions it takes to achieve this? |
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Definition
| Network Failsafe Device monitors the network traffic on the ports of the Data Mover to activate the standby port if a failure is detected on the active port. |
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Term
| List 4 benefits achieved by the network FailSafe device- |
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Definition
| 1. Configuration is handled transparently to client access. 2. the ports don't have to be the same type 3. Rapid recovery 4. can be combimed with logical Aggregated Port devices for higher redundancy. |
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Term
| What is Link Aggregration? A list the 2 methods? |
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Definition
combining of 2 or more data channels into a single vitual one for higher availibilty but same throughput
1. IEEE 802.3ad LACP
2. Cisco FastEtherChannel using Port Aggregation Protocol (PAgP) |
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Term
| Fill in the blanks
[image] |
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Definition
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Term
| Whats the benefit of a VLAN? |
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Definition
Performance -reduced packet collisions
Reduced overhead and cost
Security |
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Term
| List the 3 main types of File System quotas |
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Definition
1.Soft - user get a warning
2.Hard - limit on the totatl number of files or space on the File system
3. Tree - limits based on directory tree |
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Term
| Where is the UserMapper DB stored in DART 5.1 and 5.2? |
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Definition
5.1 In the primary and secondard severs.
5.2 in the Data Mover |
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Term
| In DART pre v5.2, what are the two modes DART uses to authenticate Windows permissions and what are their differences? |
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Definition
| Single mode- on the Primary Server is used. Distributed mode, the primary server is queried and the secondary servers. |
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Term
| What is a VDM and what is it used for? |
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Definition
| Virtual Data Mover - used to create multiple CIFS on one data mover to seperate environments, consolidate multiple severs seperately on one DM, and allows each VDM to be moved or replicated to another DM |
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Term
| Name 4 Celerra MMC snap-ins |
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Definition
1. Unix user management
2. Virus Checker Mgt
3. Home Directoty
4. Data mover security |
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Term
| From fastest to slowest (based on time), list the 3 recovery solutions for disk-based replication |
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Definition
| 1. Celerra/Symmetrix using Synchornous disaster recovery- Using SRDF data is recovered in seconds. 2. Celerra/Clariion using File based replication to recovered data in mintues of locate and remote mirrors. 3. Celerra NS600- File Restoration from archived disk or tape which takes hours. |
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Term
| What is the Celerra synchronous disaster recovery solution? |
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Definition
| Allows remote configuration of standby Data Movers, SRDF between 2 Symms, Real-time copies of volumes, uni or bidirection link between the 2 data movers, Active/Active or Active/Passive SRDF modes |
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Term
| In SnapSure, what is a PFS and a SavVol |
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Definition
| Primary File system and Meta-Volume copy area. |
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Term
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Definition
| Creates incremental backup views of PFS, individual file recovery, and roll back of an entire file system to a previous point in time image using pointers to the changes and reads data from the PFS and the SavVol. |
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Term
| What the main advantage to TimeFinder/FS? |
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Definition
| It allows users to copy a File System into a BCV. |
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Term
| What does TimeFinder/FS Near Copy do? |
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Definition
| It utilizes SDRF to create a read only BCV copy of production data that is updated remotely via R1 to R2 synchronizing. |
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Term
| What is this diagram of and what is its purpose?[image] |
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Definition
| Time Finder/FS w/SRDF Far Copy- it creates a R1/BCV copy of the PFS then uses SRDF adaptive copy to the R2/BCV and then restores it as a FS to the remote celerra wih read-only access. |
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Term
| What is and how does Celerra Replicator-Data Replication Asynchronously recover data? |
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Definition
| IP-based either locate or remote replication between primary and secondary FS. 1. manually push a full copy from PFS to SFS. 2. Changes to the PFS are stored in the Log. 3. Log changes are copied to the Primary SavVol, then moves to the secondary SavVol. 4. the S-SavVol changes are moved into the SFS. |
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Term
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Definition
| EMC Data Manager used in backups of NAS file systems, including both NFS and CIFS. |
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Term
| What is NDMP and why is it a faster backup solution than Network? |
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Definition
| Network Data Management Protocol. Because it is a LAN-less local backup. i.e a tape drive directly attached to a Symm controlled by a client on the LAN w/ the NDMP software |
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