<PAGE>
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13G
(RULE 13d-102)
INFORMATION TO BE INCLUDED IN STATEMENTS FILED
PURSUANT TO RULES 13-1(B), (C) AND (D) AND AMENDMENTS
THERETO FILED PURSUANT TO RULE 13-2(B)
(AMENDMENT NO. __________)
CROSSROADS SYSTEMS, INC.
--------------------------------------------------------------------------
(Name of Issuer)
COMMON STOCK, $.001 PAR VALUE
--------------------------------------------------------------------------
(Title of Class of Securities)
22765D100
--------------------------------------------------------------------------
(CUSIP Number)
DECEMBER 31, 1999
--------------------------------------------------------------------------
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this
Schedule is filed:
/ / Rule 13d-1(b)
/ / Rule 13d-1(c)
/X/ Rule 13d-1(d)
Page 1 of 7 Pages
An Index of Exhibits appears on Page 7
<PAGE>
- -------------------- -------------------------
CUSIP NO. SCHEDULE 13G Page 2 of 7 Pages
22765D100
- --------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)
Advanced Digital Information Corporation 91-1618616
- --------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /
(b) / /
- --------------------------------------------------------------------------------
3 SEC USE ONLY
- --------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
WA
- --------------------------------------------------------------------------------
5 SOLE VOTING POWER
2,608,696
NUMBER OF -----------------------------------------------------------------
SHARES 6 SHARED VOTING POWER
BENEFICIALLY 0
OWNED BY
EACH -----------------------------------------------------------------
REPORTING 7 SOLE DISPOSITIVE POWER
PERSON 2,608,696
WITH
-----------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
0
- --------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
2,608,696
- --------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* / /
- --------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
approximately 9.8%
- --------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
CO
- --------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
Page 2 of 7 Pages
An Index of Exhibits appears on Page 7
<PAGE>
SCHEDULE 13G
ITEM 1(a). NAME OF ISSUER.
This Schedule 13G relates to Crossroads Systems, Inc., a Delaware
corporation (the "Company").
ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:
The Company's principal executive offices are located at 9390 Research
Blvd., Suite II-300, Austin, TX 78759.
ITEM 2(a). NAME OF PERSON FILING.
This Schedule 13G relates to Advanced Digital Information Corporation.
ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE.
The business address of the reporting person is P.O. Box 97057, Redmond, WA
98073-9757.
ITEM 2(c). CITIZENSHIP.
Advanced Digital Information Corporation is a Washington corporation.
ITEM 2(d). TITLE OF CLASS OF SECURITIES.
This Schedule 13G relates to the Company's common stock, $.001 par value
(the "Common Stock").
ITEM 2(e). CUSIP NUMBER.
The CUSIP number for the Company's Common Stock is 22765D100.
ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), OR 13d-2(b)
OR (c), CHECK WHETHER THE PERSON FILING IS A:
(a) / / Broker or dealer registered under Section 15 of the Exchange Act.
(b) / / Bank as defined in Section 3(a)(6) of the Exchange Act.
(c) / / Insurance company as defined in Section 3(a)(19) of the Exchange
Act.
(d) / / Investment company registered under Section 8 of the Investment
Company Act.
Page 3 of 7 Pages
An Index of Exhibits appears on Page 7
<PAGE>
(e) / / An investment advisor in accordance with Rule 13d-1(b)(1)(ii)(E).
(f) / / An employee benefit plan or endowment fund in accordance with
Rule 13-d-1(b)(1)(ii)(F).
(g) / / A parent holding company or control person in accordance with
Rule 13d-1(b)(1)(ii)(G).
(h) / / A savings association as defined in Section 3(b) of the Federal
Deposit Insurance Act.
(i) / / A church plan that is excluded from the definition of an
investment company under Section 3(c)(14) of the Investment
Company Act.
(j) / / Group, in accordance with Rule 13d-1(b)(1)(ii)(J).
NOT APPLICABLE
ITEM 4. OWNERSHIP.
The following describes the ownership of Common Stock by Advanced Digital
Information Corporation as of December 31, 1999:
(a) Amount beneficially owned: 2,608,696
(b) Percent of class: approximately 9.8%
(c) Number of shares as to which such person has:
(i) Sole power to vote or direct the vote: 2,608,696
(ii) Shared power to vote or to direct the vote: 0
(iii) Sole power to dispose or to direct the disposition of:
2,608,696
(iv) Shared power to dispose or to direct the disposition of: 0
ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.
Not applicable.
ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.
Not applicable.
Page 4 of 7 Pages
An Index of Exhibits appears on Page 7
<PAGE>
ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY.
Not applicable.
ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.
Not applicable.
ITEM 9. NOTICE OF DISSOLUTION OF GROUP.
Not applicable.
ITEM 10. CERTIFICATIONS.
Not applicable.
Page 5 of 7 Pages
An Index of Exhibits appears on Page 7
<PAGE>
SIGNATURE
After reasonable inquiry and to best of its knowledge and belief, Advanced
Digital Information Corporation certifies that the information set forth in this
statement is true, complete and correct.
Dated: February 4, 2000
ADVANCED DIGITAL INFORMATION CORPORATION
By: /s/ PETER H. VAN OPPEN
-------------------------------
Name: Peter H. Van Oppen
Its: Chief Executive Officer
Page 6 of 7 Pages
An Index of Exhibits appears on Page 7
<PAGE>
EXHIBIT INDEX
(1) Statement required by reporting persons pursuant to Rule 13d-1(k)(1)
(see signature page).
Page 7 of 7 Pages
An Index of Exhibits appears on Page 7
