**Exhibit 31.2**

**CERTIFICATION OF CHIEF FINANCIAL OFFICER**

**PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF2002**

I, Hanif I. Jamal, Chief Financial Officer and Treasurer, certify that: 

1. I have reviewed this Annual Report on Form 10-K of Dot Hill Systems Corporation; 

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make thestatements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report; 

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flowsof the registrant as of, and for, the periods presented in this report; 

4. The registrant’s other certifying officer and I areresponsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and15d-15(f)) for the registrant and have: 

(a) Designed such disclosure controls and procedures, or caused such disclosure controls andprocedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in whichthis report is being prepared; 

(b) Designed such internal control over financial reporting, or caused such internal control overfinancial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally acceptedaccounting principles; 

(c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented inthis report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and 

(d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’sfourth fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and 

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committeeof the registrant’s board of directors (or persons performing the equivalent functions): 

(a) All significant deficiencies andmaterial weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in theregistrant’s internal control over financial reporting. 

/s/    HANIF I.JAMAL         

Hanif I. Jamal 

Chief Financial Officer and Treasurer 

(Principal Financial and Accounting Officer)

Date: March 9, 2009