That would make sense - just because you have more drives doesn't mean the policy has to change - but i was hoping...
Kurt On Wed, Feb 8, 2012 at 22:06, Phil Brutsche <[email protected]> wrote: > I've not had a chance to use any of the SAS expansion trays. > > Based on my conversations with EMC engineers, the RAID limitations apply > regardless of whether the drives are in the main chassis or in an external > enclosure. > > -----Original Message----- > From: Kurt Buff [mailto:[email protected]] > Sent: Wednesday, February 08, 2012 3:07 PM > To: NT System Admin Issues > Subject: Re: EMC limitations? > > Thanks for the further data. > > I'm going to agitate that we don't do much in the way of upgrading this unit, > and let it run its course as it is - maybe give it to the engineers for their > lab. > > I didn't want to bring up the RAID6-only madness with their large SAS (what > they call Near-line SAS) drives - that's a whole other level of stupid. > > I didn't know about RAID5 madness. > > Have you extended the unit with more trays? if so, do the same kinds of > limitations on on RAID apply? > > Kurt > > On Wed, Feb 8, 2012 at 12:02, Phil Brutsche <[email protected]> wrote: >> I've worked with the EMC VNXe. The good parts: >> * They're fast >> * They're multiprotocol: They do iSCSI, NFS and CIFS/SMB. Theoretically, >> you could use one to replace a Windows or *NIX+Samba file server. >> * They integrate with enterprise backup solutions, so that your >> backup solution uses the integrated snapshot facility to read your >> data directly from the storage appliance >> >> I've not used the CIFS feature, as I've only ever used them in conjunction >> with VMware vSphere aka ESXi, both as an iSCSI target and as an NFS server. >> >> The limitation you mention is not the only one. I've not run into it, but >> it's one I'll keep a look out for. I speak from experience that the 1.99TB >> limitation is due to their iSCSI target. I've created 4TB NFS exports on >> one, using NL-SAS drives, for use with VMware. >> >> Other stupid limitations: >> * They are VERY VERY STRICT about your allowable RAID configurations. For >> example, if you put 12x 1TB SAS drives in it, you have 2x 6 drive RAID6 >> arrays at roughly 4TB each. If you put 12x 15k SAS drives in it, you have 2x >> 5 drive RAID 5 arrays and 2 hot spares. Period. You have no other RAID set >> options. >> * As an iSCSI target, they don't multipath. Period. Redundancy is handled >> by migrating the iSCSI service (or NFS service, or CIFS service) between the >> controller cards. >> >> Truly and honesty, if you want an entry-level iSCSI storage box your best >> bet is one of these devices: >> * Dell MD3200i >> * IBM DS3512 >> * HP P2000 G3 >> >> All three of those boxes are the *exact same device*; the OEM is LSI. They >> are all just as fast as the EMC - faster even, since they support multipath! >> - and do not suffer from the arbitrary storage limitations of the EMC. The >> downside is they only support iSCSI (or SAS)... but you can also say they do >> one thing and do that one thing VERY well. >> >> -----Original Message----- >> From: Kurt Buff [mailto:[email protected]] >> Sent: Tuesday, February 07, 2012 6:22 PM >> To: NT System Admin Issues >> Subject: EMC limitations? >> >> I've got a new-ish (January) EMC VNXe 3100, and have run into a troubling >> limitation - in use as an iSCSI device, it doesn't support LUNs larger than >> 1.99tb. According to a post by EMC staff on their community forum, it's doe >> to the implementation of the SCSI II protocol. >> >> I don't know if this limitations affects its use as a NAS, but that's >> disturbing. My Lefthand units support larger LUNs with no problem. >> And, otherwise, it's performed just fine - no problems at all. >> >> Does anyone out there now if other EMC products have this limitation? >> >> Kurt >> >> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ >> <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ >> >> --- >> To manage subscriptions click here: >> http://lyris.sunbelt-software.com/read/my_forums/ >> or send an email to [email protected] >> with the body: unsubscribe ntsysadmin >> >> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ >> <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ >> >> --- >> To manage subscriptions click here: >> http://lyris.sunbelt-software.com/read/my_forums/ >> or send an email to [email protected] >> with the body: unsubscribe ntsysadmin > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ > <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to [email protected] > with the body: unsubscribe ntsysadmin > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > --- > To manage subscriptions click here: > http://lyris.sunbelt-software.com/read/my_forums/ > or send an email to [email protected] > with the body: unsubscribe ntsysadmin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to [email protected] with the body: unsubscribe ntsysadmin
